Absurdly Sharp Blade: The Ether Blade. It appears to be made either out of transparent material or pureenergy, and it has the innate advantage of going through heavy armor like butter. The player who wields one will leave every enemy in various forms of total dismemberment after only a couple of swings. In the lore, it was made as a merciful way to dispatch any Tenno (or allies of the Tenno) that had become infested.
Really, all of the bladed weapons count as this, although it's justified given the fact that futuristic materials and techniques are almost certainly involved.
Ace Custom: Multiple variants: Prime (Orokin), Wraith (Grineer), Vandal (Corpus), and Dex (Lotus).
The Grineer's weapons are pseudo-organic in design, having odd bulges and protuberances in places. Their colors are often vomitous shades of yellow, orange, and green. Examples include the Gorgon LMG and the Grakata assault rifle. Their spaceships are bulging, hard, and utilitarian shapes, based off of modern-day submarines.
Corpus weaponry is boxy, fitting more with their crewmen than their security bots. They're almost universally light grey in color (or if you want to spice things up, dark grey), with splashes of added cyan or green glowy bits. Examples include the Dera plasma rifle, the Supra squad support weapon, and their version of the Flux Rifle. Their ships follow the same concept.
Tenno weapons are streamlined, built with equal parts form and function in mind. They have classic wooden stocks or handles with intricate metal or porcelain sculptures for the main body. They are colored neutral greys and blues. Examples include the Paris bow, Latron combat rifle, Furis SMG, and Tigris sawed-off shotgun. Like the Warframes themselves, some of their older equipment designs (like the Glaive or Skana) have semiorganic style elements reminiscent of the Infested.
The Acrid is a notable exception. It looks more like an attempt by the Grineer to integrate Infested tissue into their weaponry. The Acrid is a Grineer design handgun with a canister of sickly green Infested material.
Orokin technology, evident in their Void Towers and their Corrupted defenders (and Prime-quality Warframes and weapons), is smooth and flowing, ivory white and richly decorated with gold. It bears some similarities to the Tenno weaponry and equipment, but tends to be more ostentatious with the gold plating, or covered in odd gold struts. Their facilities are Crystal Spires and Togas, with lots of gold and ivory decorating streamlined, white hallways and Zen-style plants and waterfalls here and there.
What makes the Lex pistol and Burston rifle stand out is that their design does not directly fit any of the factions. They are too symmetric and boxy to be Grineer weapons, too rounded and angular to be Corpus based, too simple and mechanical to be Tenno weapons. Their manufacturer has led to some speculation by the Forum.note In the original Dark Sector pitch, Grineer Marines are seen using Burstons, and were the choice of Lancers, up until the similar Grineer Hind replaced the Burston.
However, the addition of Burston Prime (and later the Lex Prime) hints that Burston may in fact be a Tenno weapon.
After the End: A war happened in the background a long long time ago, one that got all the Tenno locked away into space, made the Orokin vanish, and spawned the Infested. The other combatants were apparently beings called the "Sentients".
Affably Evil: Ironically, Ruk fulfills this trope in the Gradivus Dilemna Event. Where Alad taunts the player over the fact that he has grand designs for their captive comradesIE dissecting them and using their remains to build a prototype security proxy out of Tenno parts but is arguably the lesser of two evils since helping him will not result in an enslaved Mars, Ruk will compliment the player's skills and express vicious satisfaction that they now fight together to crush the Corpus. When fighting against him, he appeals to their sense of honor, urging them to turn against Alad to save their comrades, and reminding them that the Corpus will turn on the Tenno when they're no longer profitable (and that they will crush the Corpus using the Tenno's bodies.) If the player ran more Grineer missions than Corpus, he genuinely thanks the Tenno supporting him, tells them that they fought bravely and did not have to fight as hard as they did, and, if the player ran a hundred missions for the Grineer, tells them that the Tenno have what the Grineer can't make in a cloning tube: the heart of a warrior. Aww.
Also, throughout the event, Alad V, being a tight-fisted Corrupt Corporate Executive, is not very happy about handing out battle pay. Ruk, on the other hand, eagerly gives out rewards, telling Tenno to keep it up, there's more where that came from.
The encyclopedia entry for Operation Sling-Stone shows the the Corpus and Grineer pulling guns on each other while negotiating. The whole special event series also shows how violent the contract dispute has gotten - all for a mere few billion credits.
History repeated itself during the Gradivus Dilemma event. The Corpus discovered a few Tenno in cryosleep near Mars and wanted to keep them for experiments. This, however, violated a contract with the Grineer, who demanded that the Corpus hand the Tenno over to them. Alad V, the Corpus member who found the Tenno, blew the Grineer off, confident that boosting anti-Grineer resistance on Mars would protect them against the Grineer. Needless to say, the Grineer invaded, using the violation as an excuse to crush and subjugate Mars. Unlike Sling-Stone, however, the Tenno themselves were less united in helping them out, mostly because the Grineer gave better rewards and that the Corpus had several Tenno in cyrosleep hostage.
Air Vent Escape: Inverted, the Tenno often do an air vent intrusion, complete with knocking out the air vent grates noisily.
Altum Videtur: A single-word example; Corpus can be translated from latin to mean 'corporation', amongst several other things. The symbols used in their writing (various ship signs, broadcasted messages, etc.) seems more like a mix of the standard latin and cyrillic scripts, though.
Ambiguous Gender: The playable Tenno. Any Tenno can use any Warframe despite the suits having clearly gendered physiques and being referred to with gendered pronouns in their profiles. Hypotheses range from a Tenno being able to change apparent sex and suit at will, to multiple Tenno under the player's command. Vor's dialogue during the Vor's Prize quest claims each Warframe is controlled by one person - and that person may be pure energy. Granted, given that it's Vor, he may just be speaking pretentiously.
An Adventurer Is You: The frames fit these roles relatively well, although there's a fair amount of crossover:
The Tank: Rhino* The Mitigation Tank, Frost* A variant Magic Tank.
The Healer: Trinity* As well as The Regenerator and The Resource Master.
The DPS: Volt* The Nuker, Ash* The Backstabber, with The Scrapper as his fourth power, Excalibur, Valkyr* The Scrapper with some Meat Shield, Zephyr* With some of The Avoidance Tank, Hydroid* With just a touch of The Summoner.
Jack of All Trades: Nekros* Widely considered to be a "support" frame, but doesn't neatly fit in any other category, and can be outdone in every area., Oberon* Half The Healer, half The Nuker, not quite either.
Animeland: Everything about the Tenno is taken from stereotypical anime depictions of ninja and samurai: the way they sit, their swords, their motions, their name, their very design...
An Interior Designer Is You: The Clan Dojo. Certain rooms and objects perform various functions for the Clan members, while others are merely aesthetic.
Anti-Armor: Weapons with high focus on puncture damage do more damage to heavily-armoured enemies like Grineer soldiers, but less so than they do to lightly-armoured enemies like the Infested. Meanwhile, impact damage is best for depleting shields and robots' health but is less effective against armour or organics. Conversely, slash damage focused weapons tend to do very poorly against heavily-armoured foes, but often gain significant damage multipliers versus the squishy and mostly-unarmoured common/non-ancient Infested. Weapons tend to have clear specializations from their base damage types as a result, but good elemental mods can make most weapons usable regardless of their base physical stats.
Corrosive damage does +75% damage (so 175% total) to armor, and can permanently reduce the target's maximum armour. Brutally effective against the Grineer as a result. Magnetic damage works similarly against Shields, making it ideal for tackling the Corpus.
If you fall into a Bottomless Pit, you will be automatically brought back up, with no damage sustained* although you will lose any buffs you had on your 'frame, such as Rhino's Iron Skin or Nova's Null Star.
The drop rate for Warframe blueprints from bosses used to be appallingly inconsistent- while it was possible to get blueprints for all 3 components (helmet, chassis, systems) in 10 runs or less, there were horror stories of players running a single boss up to seventy times without getting a full set; not only was there a chance that the blueprint drop wouldn't be what you wanted, but an even greater chance that a blueprint wouldn't drop at all. This was changed so now you're guaranteed a blueprint reward for completing a boss assassination mission, rather than blueprints being Random Drops from the bosses. It may still take a few runs to get all 3, but it ultimately takes a LOT less time to get new 'frames.
In the stealth Mastery test, no matter your choice of melee weapon you will always One-Hit Kill the mooks, even if you mistime and only trigger a normal attack instead of a Back Stab.
Armor Is Useless: Nope. All that heavy armour the Grineer wear is fairly effective against small arms fire (especially on Ceres or Sedna, where the higher levels mean Grineer turn into bullet sponges), and those huge helmets worn by Corpus Crewmen stop standard bullets cold. Not so much use against flaming swords or lightning-fists, though, or toxic bullets that give the enemy radiation poisoning on top of an infection, then freeze/electrocute/immolate them.
Warframe Armor however is currently a very poor stat to boost: even armor-extraordinaire Valkyr struggles, and she has three time the armor of the next frame with the highest armor.
On the other hand, Rhino's Iron Skin is more or less a layer of ablative armor, and it lets him take a lot more punishment than he normally could. This is because it is functionally a third set of hitpoints* 400/600/800/1200, depending on level, on top of his health and shields, that soaks up damage before it reaches him.
Armor-Piercing Attack: Following Update 11, weapons have a portion of Puncture damage (effective against Grineer and Corpus crewman helmets), and be can modded for Punch-Through properties (making bullets go through cover or enemies, letting you hit multiple enemies, or ones hiding behind cover or riot shields).
Art Evolution: The Corpus' MOA robots used to be sleek and organic-looking - an update changed them to be more obviously robotic and plated.
Grineer used to speak pure English. They still do from time to time, but it's obviously not their first language and they often yell and curse at players in a mixture of English and their own language.
The Corpus received a more intelligible language than the inhuman grunting robot noises they used to make.
Captain Vor used to be a red colored Flame Blade, but got a serious makeover turning him into old man with serious cybernetic augmentations and an Orokin key in his chest that he uses for special attacks.
Similar to Vor, Sargas Ruk was a generic-looking Grineer goon with generic boss ranting, but the Gradivus Dilemma turned him into a fire shooting Cyber Cyclops who talks in Hulk Speak.
Alad V used to be voiced by a different actor (with a thick Canadian accent), and appeared as a generic Corpus goon. Gradivus changed him into a Sissy Villain with an odd eye visor. Compare this to this.
Vay Hek, who was a generic Grineer grunt with a bit of an ego, has now turned into a propaganda-spewing lunatic piloting some sort of mech. As of Update 13, his cybernetic body enhancements far surpass even Sargus Ruk's. Little trace of his human origin can be seen (except his face) in his new design.
The AI can be very stupid about spotting you, especially if you're crouching. Stealth is actually reasonably possible if you're careful and cunning. Also expect to hear (and see) the occasional death from the AI standing in the fire hazards that sometimes occur during a mission.
Update 10 and 11 have had problems with rescued hostages suddenly refusing to follow players.
The Red Veil hostages rescued starting in Update 13.1.0 are highly prone to Suicidal Overconfidence, trying to stand their ground against Grineer troops when even the players are desperately cutting and running.
Artificial Brilliance: On the other hand, AI upgrades have allowed enemies to make repeated attempts at triggering an alert if they keep getting killed, jump onto obstacles to get a better vantage point or reach a sniping Tenno and even use ziplines and Parkour panels.
As of Update 13, clans or alliances that have deployed solar rails to a dark sector also have drones and proxies to defend it from attack, most notably other clans wanting control of that sector.
Attack Its Weak Point: Most enemies have one or more spots that take more damage than the rest of their body, or a spot that is more vulnerable to damage of a given type (though it may be highly resilient to other types). Grineer Marines are well-armoured except for their faces. Zigzagged By the Corpus, who are protected by massive helmets but whose head can be revealed with a shot to said helmet. Most infested are either devoid of clear weak points or it's barely worth aiming for them, Lephantis however plays this completely straight with 3 weak points (one per head).
The Banshee's Sonar ability actually creates temporary "weak points" by making the highlighted part take four times as much damage as it would normally for as long as the power is active. As a result, these weak points can stack with existing weak points, making it possible to inflict truly massive damage if it highlights certain locations.
Many overhauled bosses now follow this trope, being completely invulnerable to damage until their weakpoint(s) are exposed, usually following an attack.
Attack Pattern Alpha: Back when the Grineer spoke English, they were extremely fond of "Combat Formation Bravo," which apparently meant "stand in front of the space ninjas and shoot at them".
Authority Equals Asskicking: All of the Grineer bosses are vastly superior to the common marines in combat. Tyl Regor is a scientist, for instance, but can easily tear you apart in melee combat. Councilor Vay Hek? Well, he's armoured up and packs a Big F'ing Shotgun.
Fridge Brilliance for Hek: that BFShotgun is named after him, he probably designed the thing.
Back-to-Back Badasses: It's quite easy to invoke this with another Tenno, as in many of the trailers. In addition, Ruk seems to see Grineer-oriented Tenno this way during the Gradivus conflict:
Sargas Ruk: "Rraahudd, Tenno! Now we fight together! Now we crush the greedy milk from their skulls. The Corpus will pay for their crimes with their useless lives."
BFG: One possible room on a Grineer Galleon has a house-sized cannon in the middle that constantly fires into space. A similar stationary artillery emplacement can be found on the Phobos Settlement tileset, and Corpus Gas Extractors have huge turrets no doubt designed to repel any Grineer raiding parties.
The Supra is an enormous, boxy laser machine gun. Really, there's big effing guns everywhere.
BFS: The Gram greatsword looks like someone grabbed Soul Edge and made it use plasma edges. There's also the Galatine, a gigantic Tenno-made greatsword.
The Big Guy: Each and every (male) Grineer soldier is a hulking brute. Some of the females are also hulking, but are thinner and taller than the males. Also the Rhino and Frost Warframes' role, being the toughest but also the slowest.
The overall largest Grineers are actually the gangly female Heavy Gunners as the male heavies (Bombards and Napalms) are significantly shorter.
Bigger Bad: Much of the game's mess can be laid at the feet of the leaders of the Grineer and the Corpus, none of whom you get to strike directly at. The best you can get are politicians-slash-officers leading efforts that are detrimental to the Tenno, and they don't stay down for long, thanks to either cloning or robots.
Black Box: Orokin artifacts. Even the Corpus - the corporations that manufacture technology based on the artifacts - do not know how most of them work, and non-Prime Tenno tech is stated to be inferior copies based on the actual thing.
Black Speech: Corpus dialogue used to be composed of inhuman choking noises. This may be a function of their helmets as event cutscenes have an executive speaking in English with strong synthesizer effects and what little we hear of the helmetless Capture target's voice is very different.
Grineer now speak in some sort of harsh-sounding language with very few recognizable words. There are obvious elements of european and eastern-european languages in there, along with modern english corrupted by Nu Spelling, ("Target" becomes "Targat") possible Future Slang, and thick accents ("Okay" has become "Oghi?"). However, there's a great deal of what they're actually saying where your guess is as good as mine. For example, "Got kan tero sonafa gunta", which might be "goddamn tenno son of a gun".
The female Grineer voice set used by their snipers and heavy gunners that were used when the Grineer spoke English were this, with near-indecipherable barks and screeches. They're comprehensible if you pay close attention, though.
The Corrupted encountered in Orokin Void Towers also 'speak' (or at least vocalize in some fashion) an unknown, hissing 'language' that is very vaguely similar to the Stalker's vocalizations. Whether it's actually a means of communicating or just general strangled noises of surprise/anger/etc. is anyone's guess.
The Stalker verbally communicates through what can only be described as wordless, breathy hissing.
It is entirely possible that if the Tenno ever spoke, it would sound very similar to the Stalker since they both were once members of the Orokin Empire and presumably spoke the same language.
Banshee can do this with extreme prejudice via a properly-leveled Sonic Boom attack. Nekros can likewise do the same against a single enemy with Soul Punch, but his concussive force is far greater, capable of sending Grineer Heavies flying clear across the room, knocking over everything in their path.
Boarding Pod: Recently added to some Grineer ships in Invasion missions are boarding torpedo launchers which you use to cross from the Grineer ship to the enemy Corpus one. When defending a Corpus ship you might sometimes find a room with one of these boarding torpedoes smashed through the hull with a Grinner marine or two piling out of it.
Body-Count Competition: The game can easily fall into this with well equipped players, who will try to get a few kills before their team mates can because the entire team is tearing apart the enemy hordes thrown at them. Not helped by the mission results keeping a score of who killed the most enemies.
Played Straight by: Most Grineer troopers, who wear heavy armour everywhere except their heads. On the other hand, the sturdy looking UFO-shaped helmets on medium Grineer are apparently no more durable than flesh and bone.
Inverted and Played with by: Corpus Crewmen. Almost no body armour whatsoever, but massive helmets that used to be bulletproof. Now, you can knock them off to get a good, clean bullet to their faces.
Boring, but Practical: Loki fits this trope to a tee. His abilities are boring compared to the fiery doom wreaked by Ember or the flashy frost moves by Frost, but as a pure utility frame, Loki remains consistently useful against every faction, at every level, on every mission type.
Excalibur is also very much this. He's the "standard" starting warframe note You get the choice between three but the game recommends Excalibur as a well rounded beginner option and does several things fairly well, but is severely outclassed by specialised frames and his abilities are all very bland.
Rhino can very easily become this by keeping Iron Skin on at all times and using Rhino Stomp. It quickly devolves the game into pressing a single button to clear out the enemies in a given area, then moving on to repeat the process.
Soma is one of the most powerful weapons in the game if properly modded, but it's a fairly standard hitscan automatic rifle with nothing flashy at all.
Bow and Sword in Accord: Possible thanks to the Paris, Paris Prime, Cernos and Dread bows, and the wide selection of swords.
Brainwashed and Crazy: Implied to be done by the Corpus: the flavor text for Neptune indicates they indoctrinate people into being drones.
Also the fate of any intruders that succumb to the Neural Sentry installed in the Orokin Void Towers. They are referred to as the "Corrupted", get an Orokin-themed makeover (weird golden facemask, white/gold-themed armour, energy weapons shoot golden bolts, etc.) and attack all non-Corrupted on sight.
Bribing Your Way to Victory: You can either grind for Warframe parts and wait until the RNG is kind enough to grant upon thee Catalysts or Reactors to make your weapon twice as effective... or just pay for it. While you can't buy Prime parts, you can pay for the keys for access to Towers that contain said parts. While cash is not required for either of that, it does make it more convenient.
Mods and keys can now be traded by players, even for Platinum (the real cash currency). While a player who is short on luck can give up and fork up some money for a mod, it also means that things like equipment slots and gear-empowering items are more available to players who sell mods.
Broken Pedestal: Part of the reason behind Frohd Bek hunting down Alad V - though, given the Corpus culture of greed, this is mostly because Alad V A) owes a lot of money to the board, and B) Frohd will get kicked off the board as CEO if he doesn't stop Alad's project.
"What happened to you, Alad? I used to look up to your profits. I used to look up to your products."
Came Back Wrong: In the Codex entry for the Excalibur Warframe, it is stated that the Orokin hid refugees and survivors of the Orokin/Sentient War in the Void - and when they returned, they came back changed. The Orokin turned these changed into the Tenno, to help fight the war. The Stalker expands on this, and depending on how you read it, the plan had either Gone Horribly Right or Gone Horribly Wrong.
Camera Screw: Attempting to run a Stealth Mission with a bow or throwing knives is difficult if you are forced to put your back up against any solid object or a wall, because the camera is too close to your 'frame. Your head and shoulders will fill most of the viewing area, including the area around the aiming reticule, ruining your aim. Attempting to move away from the wall might cause an enemy to see you, breaking your stealth.
All ships have a PA system. They remind the workers to not misuse industrial equipment, to follow proper procedures when handling Orokin tech, to ensure doors are locked, and generally to stay safe. Occasionally, there'll be a call for various codes in various ships of the bay... presumably the four-man team of ninjas tearing that part of the ship apart.
In early beta, ships with active PA systems would announce the Tenno's presence over the loudspeaker. This feature disappeared for a while, but later on, PA announcements came in the Grineer and Corpus language, so it's hard to tell what they're saying anymore. The word 'Tenno' is clearly recognizable, however, and judging from the tone of these announcements they likely aren't invitations for tea and biscuits.
The Grineer outpost on Phobos feature hovering drones which broadcast propaganda speeches in Grineer language. Unlike the ship PAs these boost the nearby Grineer into fighting more effective. Destroying them removes this buff.
Canon Welding: darkSector is canon, in some form or another-according to Livestream 10, Hayden Tenno was actually the first Tenno. There's also the Proto skin for Excalibur, which supposedly existed before the Orokin.. Which explains a... actually, that just raises a whole lot more questions.
Chunky Updraft: The graphical representation of Rhino's ultimate power, Rhino Stomp, is to fill the air with helplessly levitating enemies and scraps of deck plating. Similarly, Frost's AOE attacks involve frozen chunks of ice flying about in the air. Banshee's Sound Quake causes similar floating deck-scraps as well, as does Mag's Crush.
Clean Cut: A common result of any kill from Slash damage, main sources being bladed melee weapons such as the Dual Ether, or beam weapons like the Flux Rifle. Vertical, horizontal, diagonal... there are several possibilities!
Cloning Blues: The Grineer rely on hordes of clones to kill: the problem is that they tend to degenerate. Their solution? Cybernetics, and more clones. You go after a scientist trying to fix the cloning defects.
The Computer Shall Taunt You: All bosses begin taunting the player when missions close to their stages are unlocked. During the stages themselves the bosses will taunt the player as he or she progresses through each room.
Ospreys are either teal (shield), green (leech), yellow (minelayer), orange-ish (scavenger), orange (Oxium drone) or white (fusion MOA drone).
Grineer troops are also somewhat colour-coded - common soldiers are faded light green, shotgunners are orange, melee troopers and Shield Lancers are black, Napalms are red, Heavy Gunners used to be vivid green and white before their new model, and so on.
Most Corpus Crewmen wear standard beige/sand-coloured suits, though their Elites wear blue suits, Techs wear red suits, and Sgt. Nef Anyo has a black suit, and the Corpus Ambulas is colored black with gold trim.
The Stalker is pitch-black, with dashes of red.
Orokin Corrupted are white-grey, with splashes of gold. Prime stuff follow the same theme.
Combat Medic: Trinity has absolutely no offensive abilities (although she can redirect damage she takes to nearby enemies [or allies, if you're feeling dickish] with her Link ability) but she's still a friggin' heavily-armed space-ninja.
Oberon also falls into this, having both damaging abilities such as Smite, to healing oriented abilities such as Renewal. His ultimate attack also deals high damagae, and enemies killed by it have a high chance to drop health orbs.
A language of corrupted English (among others) was made for the Grineer. It has a harsh, guttural sound, like a mashup of English, Russian, German, and one or two other languages.
It is known that there is an Orokin/Tenno alphabet, with letters or sentence written on walls of the Orokin Towers, some menus or even on the Tenno themselves. The very refined and elegant appearance of said writing can easily be mistaken for just random line patterns, but devs confirmed it was writings. However, no Tenno actually 'speak'.
The language used by Corpus Crewmen is English, passed through a cypher that preserves the vowels and replaces most of the consonants with harder sounds, making it sound much more alien than it actually is.
Continuous Decompression: What happens when you break the reinforced glass in certain rooms. Oddly, even though adjacent rooms are sealed off, the decompression can apparently last indefinitely. Explosive Decompression is not present, but anything in a decompressing area (even robots, and space-suited Corpus mooks) will steadily take damage - first shields, then health. If health reaches zero they just fall over. Oddly, whilst there are shutters to seal breached windows, they do not close automatically.
Crippling Overspecialization: After Damage 2.0, damage is divided into three main types - Impact, Puncture and Slash, each of which is good against certain enemy types. A number of weapons are very strong in one type but utterly dismal in the others, such as the Slash-focused Galatine. Before the Damage 2.0 review, it was very problematic, but most weapons can now be used against any faction admitting they have the proper element modded into it.
Some Warframes only shine because of one of their abilities, and are scarcely used otherwise. Recent changes made some frames more balanced, but many still consider some frames useless. YMMV on the usefulness of individual Warframe.
Critical Hit Class: The Soma does poor base damage - but its chance for a critical hit is much higher than all of the other rapid-fire guns, comes with a slot made for the mod that increases critical hit chances, and its magazine size and fire rate ensures nearly every shot is a critical. There are now also other weapons which rely primarily on critical builds in the fashion of the Soma, such as the Vectis Tenno sniper rifle. The Grakata Grineer SMG is another notable example.
Cuteness Proximity: Ordis is initially very repulsed by the presence of a hatchling Kubrow on your ship, but as it incubates his remarks degenerate into cooing over the furball and the noises it begins to make.
Cyber Cyclops: General Sargas Ruk's helmet has only a single glowing eye, as do the Grineer Seeker and Trooper helmets, and Mag Prime, to a certain degree.
Cycle of Hurting: Swarms of Infested Ancients and Grineer Shield Lancers are infamous for this, as they have attacks which can knock players over and leave them helpless. Ancients can smack any warframe hard enough to knock them over, and Ancients tend to come in huge swarms in Survival missions. Shield Lancers generally only come in pairs, but are more annoying to deal with unless the player has a weapon with punch-through mods. Amusingly, the players can do the same to the enemy - the Jat Kittag and several other heavy weapons have "momentum" which prevents the player from being knocked over, and most heavy weapons stun the enemy.
Deadly Disc: The Miter sawblade-launcher first seen in the hands of Grineer Eviscerators, and available to the Tenno as-of Update 9.5. Exactly what it sounds like— it launches a spinning sawblade. A very bouncy one.
The Orokin Tower maps field the deadliest variety that can cut any Warframe down to size in seconds of direct exposure. In the Defense missions, the Tenno can use these to their advantage, triggering the laser beams to cut down the Corrupted. Or their allies, if they're not careful.
The Flux Rifle seems to be a handheld version of the above that is only marginally less deadly. Corpus Elite Crewmen wield these.
The Spectra is a pocket Flux Rifle with appropriately downscaled firepower. Roughly as powerful as the Flux Rifle was before they increased its damage output.
The Fusion MOA uses something akin to a Flux Rifle except bigger and nastier, capable of stripping shields and Iron Skin in seconds. Worse, it can also make the victim a Man on Fire, inflicting an additional incendiary damage-over-time effect.
Deflector Shields: Possessed by the Tenno and several tougher enemies, along with most Corpus. The Corpus Shield Osprey projects a fairly strong defensive shield around other Corpus units (drastically improving their survivability). Most of the various Bosses have exceptionally powerful shields as well, either sheer durability, rapid recharge (the most common), or Jackal's Cognizant Limbs-based shield.
Rather notably, shields ignore the enemy's normal damage resistances or weaknesses, though they do take fifty percent more damage from cold element, and seventy-five percent more damage from magnetic element.
Degraded Boss: Grineer Flameblades were once near carbon copies of Captain Vor (the first boss you'll encounter) without the boss level HP and damage, being pretty much identical in terms of battle strategy.
Depleted Phlebotinum Shells: Weapon modifications sit somewhere between this and Abnormal Ammo. Before Update 11 it was entirely possible to have an assault rifle that fires armour-piercing, incendiary, freezing or electrical bullets. Or a pistol that fires two rounds with each pull of the trigger. You can also combine them freely. Yes, even incendiary, freezing bullets. Since Update 11, the elemental builds have been reworked. Where previously you could fire incendiary freezing bullets that electrocuted, mounting Fire and Ice damage mods will now create a combined element (in this case, Blast). It's explained here.
Destructible Projectiles: The Grineer Bombard's missiles can be shot down mid-flight, though this may prove a little challenging if they're not flying straight at you. Likewise, the Ogris' projectiles can be shot down by enemy fire; think twice before launching one at a Heavy Gunner or you may find yourself in need of a revive.
Didn't Need Those Anyway: Infested can suffer more than just Critical Existence Failure; it's not uncommon to see their head and part of the upper torso blown away by a nonfatal headshot, with no ill effect (beyond taking a lot of damage) as far as the AI is concerned. Shooting them in the legs is moderately more effective, as it forces them to crawl around instead. In theory you can shoot their arms off, but it's not easy and doesn't do much to stop them from attacking you.
Loki's Radial Disarm Uber is useless against bipedal Infested for this reason. Sure it blows their limbs off but they'll continue to pursue and attack with phantom limbs that deal the same damage.
Diegetic Interface: As of Update 7, several interaction prompts and popups appear as part of the world rather than just being on the screen.
The Lex pistol doesn't look like much on first use. Tiny magazine, high recoil, low rate of fire, long reload time, and, unmodded, can't one-shot the weakest Grineer goons in the starting system. So why is it widely advocated? It's really powerful and has great accuracy even at great distance with the right mods. The key is to treat it like a Poor Man's Substitute sniper and pick your shots methodically, not a spray-and-pray close-quarters automatic. It also makes a good backup/complement to highly inaccurate or short-ranged weapons such as the Ignis and the various shotguns.
The sliding melee can be difficult to land consistently, but it deals damage more efficiently than hacking randomly.
Learning to use a bow requires learning to charge the shot rather than try to lay out shots as fast as possible, as well as taking into account the ballistic arc and flight time, but the damage from a fully-charged headshot can be very impressive.
The Ogris requires a massive investment of time and resources to obtain, not to mention membership in an advanced clan, and even after you finally get it you still need to learn how to manage the charge time, but it is EXTREMELY worth it... and then you properly mod it; when that glorious day comes, your Ogris will fire what are basically miniature nukes and destroy entire waves of enemies in one fell swoop.
The Penta grenade launcher takes a little getting used to, given its projectiles do not fly very far and bounce around. Like the Ogris, however, it is extremely deadly when properly modified and in the right hands. It requires some care to use effectively against Corpus.
The Supra has a long reload time (even with reload speed mods) and has a very slow projectile travel time. It does, however, three times the damage of the Gorgon.
Doppelgänger Attack: Councilor Vay Hek can create duplicates of himself. Whilst they are fairly easy to tell apart from the real thing (as they have yellow-green armour as opposed to Hek's darker olive-green) and are much weaker (being only level 1) they can still prove to be at least something of a nuisance.
As of Update 13, participating in a solar rail dispute between clans or alliances can have you fighting against Tenno Spectres, which are doppelgangers of the clan/alliance members you are fighting against. These doppelgangers carry the same types of loadouts and builds of the actual player, ranging from laughably easy to defeat beginner players to extremely difficult Trinitys using Link.
Double Unlock: To craft some weapons or Warframes, you need a certain Mastery Level, which requires you to level up other weapons or Warframes first. And for some of those, you first need to craft components before you can craft the item proper.
The new katanas take this to absurd levels, at least for those unwilling or unable to purchase or obtain (through trading) the platinum required. First, you need to build a dojo and lab so you can research the Nikana, which has to be researched after the Akstiletto, and requires at least 100 oxium and a rare 'argon crystal' from the Void. Then you need to actually need to build it - after obtaining 3 more crystals and 75 more oxium. Once that's done, you can use it to build the Dragon Nikana - but wait! That needs Mastery Rank 8 to use! Nevermind another 75 oxium and another argon crystal.
Drone Deployer: Corpus Techs, beefier Crewmen who can toss Shield Ospreys out to protect them. Grineer Seekers can launch Latchers, smaller versions of the extraordinarily annoying rolling balls of blades that stagger Tenno - these ones "just" latch on and explode, though they also used to have an extremely irritating variant called Nervos that paralyzed you in co-op. Corpus Leech Ospreys can launch, er, leech drones; these attach to a Tenno and drain their shields until they melee or dodge to shake them off. The worst would have to be Fusion MOAs, who deploy an actual Drone when they approach low health, effectively doubling their damage output.
Dual Wielding: Longsword and dagger, dual daggers, dual axes, meat cleavers, take your pick. Dual-wielded melee weapons tend to be very fast hitting, and most of them can hit multiple enemies per attack.
Earth That Was: Whilst not as grim as previously thought, it is clear that Earth was abandoned at some point during the past and has been reclaimed by nature; the Orokin engineered 'super weeds' to keep it out of the hands of any who might claim it. Vay Hek tried to reclaim Earth through the use of the Cicero toxin, in order to stop Earth's jungle from growing endlessly. His attempt, however, was thwarted by the Tenno.
Eldritch Location / Genius Loci: Orokin Towers, hidden away in dimensional folds and only accessible by a one-use key. Each Tower is filled with traps and still defended by some form of Artificial Intelligence called a Neural Sentry. It seems that anyone who dies in a Tower is upgraded with Orokin tech and brainwashed to serve the Tower's Neural Sentry. The Towers have a white-gold color scheme, and are full of weird features like root-like growths sprouting from the walls, and waterfalls that flow upwards. They also contain many secrets and valuable treasures from the Orokin era, waiting to be rediscovered.
Elite Army: The Tenno, whose emphasis is on small numbers of highly elite soldiers, waging a war by acting as special forces to make precision strikes.
Grineer Heavies, which come in Napalm, Bombard, and Heavy Gunner flavours. They look like upscaled, recolored versions of standard Grineer Soldiers and/or Ballistae, but are tougher and have more powerful attacks, as well as an annoying ground pound attack. Grineer Commanders are another type, just as tough, lightly armed, but have an annoying enemy ability to swap places with a player. And seeing as they tend to use it while in the middle of a lot of Grineer Mooks, well.
In a slightly more literal example, there are now Elite Lancers; these tougher troopers have personal Deflector Shields and use the Hind burst-fire rifle in place of the Grakata. Their accuracy and power was underestimated at first, and they had to be nerfed fairly hard.
Elite Zombie: Finally, the Infestation also has the Ancients (Ancient Healer, Ancient Disruptor, Toxic Ancient) which are bigger and tougher infested foes. The Healer heals nearby Infested, the Disruptor can eradicate your shields and energy with a single hit, and the Toxic Ancient's gas cloud ignores your shields.
Lephantis and Phorid would also qualify, being the Infested Bosses for the Orokin Derelict and Eris regions respectively. Lephantis is a towering mass of amalgamated bodies which fused to create a three headed monstrosity, with 2 heads with toxin-based ranged attacks and the last head sporting a gigantic scythe. Phorid is a powered-up Charger that can fire homing quills from his back, and emit a radial sound-blast to stagger his enemies.
Some Ancients are sometimes presented as "bosses" in alert missions, despite being completely normal units. J-3 Golem, a former boss, was the same way prior to his removal, but in a permanent boss position.
Update 12 added Eximus enemies, which are stronger versions of regular enemies that also have additional special abilities, including but not limited to Mana Drain and a knockoff of Frost's Snow Globe.
The Empire: The Grineer, who conquered Earth a long time ago and have spread their empire out to the rest of the solar system.
The Grineer are clearly bickering amongst themselves, fighting for leadership and control of various holdings and resources. Powerful warlords like Vay Hek and Sargas Ruk pursue their own interests in the guise of helping the Empire. Klingon Promotion and You Kill It, You Bought It seem frequent, with the rank and file not even contesting hostile takeovers in some cases.
Several builds ago, the Grineer would raid Corpus ships, or vice versa. It was a rare occurrence, but still a possibility. The infested can join the fun, as well. This feature seems to have been disabled, and/or eventually upgraded into the full-on Invasions system.
The Hunt for Alad V has Corpus board member Frohd Bek offering to give Alad's location up to the Tenno if they help him deal with the Infested, out of fear that Alad would take the chairmanship if his Zanuka Project succeeds.
One weekend event, Operation Sling-Stone, has shown the Corpus (grudgingly) reward the Tenno for taking out a fleet of Grineer ships meant for a special operation against the Corpus. The prize were some ammo conversion mods.
The fact that the basic rifle for the Tenno is Corpus in design is handwaved by the Corpus willing to work with anyone for the right amount of cash.
The Gradivus Dilemma was this again, albeit adding in Sadistic Choice and We Are Struggling Together. The Corpus and Grineer are warring again at the eponymous place and the Tenno are called to make a choice - side with the Corpus to prevent the Grineer from gaining ground, but letting them get their hands on some Tenno in cryosleep? Or side with the Grineer to save those slumbering Tenno, but letting the Grineer grow in strength? The Lotus has refused to prescribe which side a Tenno should choose, with the result that Tenno are competing with each other.
The Hunt For Alad V has Corpus board member Frohd Bek sending some MOA and Shield Ospreys to help the Tenno clear the Infested ships in Jupiter.
The Tenno are stated to be enforcing the 'balance' between the Grineer and Corpus now, and can side with either faction during invasions as they see fit. As before, Battle Pay is awarded for assisting them.
And it doesn't matter how much the various sides hate each other: once the Infected show up on the scene, everyone cuts the squabbling and works together.
Energy Weapons: Introduced in Update 9, the Flux Rifle and Spectra gun designs based on Corpus weaponry. They fire pinpoint-accurate lasers and deal extreme damage to anything the beam is focused on, but consume ammunition at appropriately high speeds.
Even Evil Has Standards: The Gustrag Three are psychopathic to the point of slaughtering fellow Marines, simply because their ship was taking too long to get to the action. When Sargas learns about this, he is disgusted that Vay Hek, who ordered their rehabilitation, would find use for traitors, and that he'll regret it when they stab him in the back.
Every Man Has His Price: Invoked by Alad V during the Gradivus Dilemma; he offers to double whatever Sargas Ruk is giving the Tenno to fight for him if you sided with the Grineer. Perhaps unfortunately, you can't actually take this offer.
Evil Makes You Ugly: The Grineer are all clone troopers and their genetic stagnation really shows in their faces. Most of the Grineer bosses have been cybernetically modified and augmented to the point where very little of their original flesh is left and only their decaying faces remain as a key to the human origins they disgrace.
Exactly What I Aimed At: In "The Profit" trailer, Zanuka dodges Banshee's thrown Glaive... which goes on to hit the control apparatus Alad V is wearing.
Excuse Plot: The game began with one; you are part of a clan of space ninjas, fighting to push fascist space assholes and their army of degenerate clones out of the known galaxy, and crush some corrupt corporate goons, and deal with a 'technocyte plague' that's overrunning countless ships, stations, and colonies. Recent updates, however, have provided tantalizing glimpses of a highly intriguing story surrounding the Orokin and the origins of the Tenno themselves..
Exploding Barrels: Bright red-and-orange barrels with little red lights - they are plentiful on most levels. The Orokin have them disguised as ceramic storage containers - look for the red slits and smoke coming out the top.
Eyeless Face: The Tenno do not have eyes, or at least not ones visible on the warframes themselves (exception of Vauban's alternate helmet). This is lampshaded by Alad V, who tells Tenno fighting for him that they finally see eye-to-eye in the fight against the Grineer, and immediately corrects himself on that.
The Lotus eyes are also covered by her helmet. The Corpus in turn have called her an "eyeless slag", which seems to hint that they see that as the Tenno's main feature.
Faceless Goons: Many (but not all) of the Grineer soldiers wear faceplates. The plates don't seem to reduce how much damage the troopers take from headshots though. The glowing eyes just make them easier to headshot in the dark, in fact. Then there's the Corpus personnel, who all wear giant bulletproof box helmets.
For their enemies, the Tenno must appear to be this.
Fan Nickname: Orokin Reactors & Catalysts - "potato". Caught on with the devs early on and seems to have stuck. One of the devs was spotted wearing a Warframe-branded shirt with a golden potato on it in Livestream #19.
Also, "Bonedaddy" for Nekros, "Trollban" or "Booben" for Vauban, "Master Race" for Loki, "Goatframe" for Oberon, and many variations on "Lobster" for Trinity and "Chicken" for Ember.
Alad V: "Salad V."
The Jat Kittag warhammer is now being called the Jet Kitty.
Fashionable Asymmetry: Event badges and several Warframes have always had this effect. As of Update 13, players can mix-and-match armor on either shoulder or leg of their Warframe, as well as wings on their Sentinel.
Fate Worse than Death: Anyone who dies (and isn't a Tenno) in an Orokin lair are indoctrinated and warped into becoming eternal guardians.
Fire Breathing Weapon: Grineer Scorches (and the players, with some Clan research) use the Ignis, a handheld flamethrower which does catastrophic damage to unarmored targets, can hit multiple enemies at once, penetrates walls, and can be modded to shoot hot-pink radiation blasts that freeze the target, or electrified explosions, or corrosive fire, or...
First Person Snapshooter: Update 11 added a "Codex Scanner" that can be used on enemies for xp as well as information on their vital statistics such as health, armour, shields, any vulnerabilities or resistances to certain damage types, locations where that enemy can be found, and items dropped.
Flash Step: Grineer Flame-Blades and other high-tier melee Grineer, as well as the bosses that resemble them, offset their melee only weaponry by the ability to teleport right next to you. Usually behind you.
Flunky Boss: Not intentionally, perhaps, but bosses often have a decent sized group of mooks on hand to help out, and provide ammo/energy drops for the players. The only boss that doesn't really have mooksnote excluding pesky Mine Ospreys, which do not drop ammo or energy has regular energy/ammo drops into his arena from overhead rails.
Foe-Tossing Charge: The first ability of the Rhino warframe, which knocks down any foes that aren't literally vaporized. Hydroid's Tidal Surge power likewise sends the user rushing forward, scattering foes in their wake.
Fragile Speedster: The Loki 'frame has the lowest starting shields and health of all the warframes (75 each) but is also the fastest of the lot, faster even than Ash and Nova.
Frickin' Laser Beams: At range the Corpus use energy-bolt or energy-beam weapons almost exclusively, with the exception of the machine guns, grenades, and missiles on Jackal and Hyena. The Supra Repeater is apparently a 'heavy laser gun' with green projectiles, whilst the Dera Rifle uses bolts of cyan plasma, to give just two examples.
The Flux Rifle and Spectra pistol fire continuous orange laser beams.
Friendly Fireproof: Infested are immune to the toxic auras of Toxic Ancients... unless you have a Nyx handy to mind-control said Ancient.
From the Corpus's viewpoint, the Gradivus Dilemma could be seen this way. First, they have a dispute with the Grineer over trade routes, but then the discovery of a large cache of slumbering Tenno incites a full-out war between the two factions - and then the Tenno get involved..
The Grineer Gorgon LMG is a minigun in all but appearance - it uses a motor driven feed system, which forces it to have a wind-up time to get to full firing speed, but it hits like a train and has an impressive rate of fire. The Corpus equivalent, the Supra, also has a wind-up time, but it has multiple barrels - they do not rotate, however.
The newer Corpus Cestra sidearm is a pocket energy repeater with a rotating multi-emitter/barrel assembly - presumably to aid in heat dispersal and rate of fire, as with actual gatling weapons. Oddly enough, the barrels are part of the magazine.
Genetic Engineering: The Grineer Empire's hordes, all turned into overly muscled brutes. Their female soldiers take the route of cybernetic enhancements, like the Corpus.
Geo Effects: Missions can sometimes start with the location having had cryogenic malfunctions or battle damage/munition storage accidents. The former halves your maximum shields for the duration of the mission, whilst the latter creates patches of burning material everywhere that inflict lots of damage if you're daft enough to stand in them. For temporary Geo Effects, some rooms can also be depressurized by shooting out the windows; this seals off the room and causes Continuous Decompression, which steadily depletes the shields and health of all players and enemies trapped in that room.
Prime Warframes also have some kind of interaction with parts of the Void Towers, such as causing certain objects to emit a once-off wave of energy to restore power to the Prime and his allies.
Orokin Tower missions feature numerous booby traps, including pressure-activated lasers and shockwave generators, proximity-sensitive collapsible covers, and fog traps that will slow down both Tenno and Corrupted foes alike. Orokin Derelict missions feature dilapidated versions of all of these, as well as stagnant water supplies with electrical currents running through them, which can quickly eat through a player's health and shields much like the fire patches in standard missions.
Glowing Eyes of Doom: Helmeted Grineer Troopers have orange-reddish eyes, whilst some of the Infested have orange-red or blue eyes. Corpus bosses also have glowing lines where eyes would be on the helmets.
Interestingly, Volt is the only Warframe that can be accused of this, as his energy color can alter lights located where his eyes should be.
Getting Crap Past the Radar: Ordis is implied to be saying (or wanting to say) the same kinds of things that Red Text always wants to say. Which is not clean.
Glass Cannon: Grineer Sawmen do a LOT of damage up close, but die from one sword slash, pistol shot, or poke. Less damaging are the Corpus Prod Crewmen, who lack the damage, but have a chance to stunlock.
Corpus in general. The lack of body armor means they'll be taken out much more easily than Grineer goons, but arm themselves with somewhat better weaponry and field shielded Mecha Mooks that are tougher and more dangerous.
Fusion MOAs can do extreme damage in a matter of seconds, stripping someone's shields (regardless of mods) in moments — but aren't noticeably more durable than regular MOA. On the other hand, they can also deploy a fairly durable Drone armed with a rapid-fire plasma weapon.
On the player end of things, Ember and (especially) Nova can dish out some pretty brutal damage, but have lackluster defense and, in Nova's case, below-average shields as well.
Word of God says that there are non-Tenno, non-Grineer/Corpus factions who are fighting against the latter - it's been alluded to in flavor text, such as Alad V. talking about supporting the Mars resistance.
The Rescue 2.0 update has the first onscreen appearance of the groups: The Red Veil resistance group.
Ground Punch: Grineer Heavies can do this to damage and knockback nearby attackers, based off the Radial Blast power that Rhino used to have.
The Guards Must Be Crazy: Both smart and stupid to varying degrees. They won't leave patrol paths to check out noises, but other times they can be deaf and blind. Usually if you engage them and aren't quick about it, one of them will run to the nearest Command Console to raise the alarm — unless you can kill them before they get there.
Guns Akimbo: You can do this with various kinds of semi-automatic and full-auto pistols.
Hand Cannon: Among the pistols you can get: a gun made to fire shotgun rounds, about as big as your head. There's also a slightly more conventional handcannon, the Lex, that does very high damage, in exchange for holding only six rounds. The Kraken, a high-damage two-shot burst pistol, also qualifies.
Hello, Insert Name Here: While boss banter is rendered in Speaking Simlish, the text-only translations will include insulting the player and his clan by name. They'll also mention the Warframe you're using.
Herd Hitting Attack: Melee attacks with dual wielded or heavy two-handed weapons (including the Bo) can hit multiple enemies per strike.
Highly-Visible Ninja: The Tenno are futuristic ninjas, but there's nothing stopping you from painting your warframe bright pink and carrying around a heavy machine gun, a pair of Hand Cannons, and a giant hammer.
It gets utterly ridicoulous when you realize the Rocket Launcher is a silent weapon meaning it's very much possible to do enitre stealth runs by exploding everything with your rocket launcher.
Some Warframes like Rhino or Nova are nigh-impossible to consider stealthy by any means.
Hit Scan: Standard implementation. Nearly everything that shoot bullets is Hit Scan, most things that do not aren't. Though most of those Frickin' Laser Beams are not painfully slow (unless they're shot by Corpus goons). There are also some pretty much instant-travel beam weapons and other oddities out there.
Amusingly, this can be done against The Stalker as of Update 11; he isn't immune to the insane headshot damage of his own bow any more than you are.
The Grineer Scorpion have been an annoyance to players since their introduction because of their hard to avoid harpoon that pulls players to their feet for several seconds. The Valkyr Warframe has a very similar ability with Rip Line allowing players to give them a taste of their own medicine.
Impaled with Extreme Prejudice: The Bolto pistol fires bolts that, upon a kill, nail the victim against whatever was behind them. The final skill of the Excalibur frame, Radial Javelin, has a similar effect. As of Update 6, the Bolto now comes in dual (Akbolto) and rifle (Boltor) formats as well. Update 7 brings the Paris, a high-tech bow that can also pin enemies to surfaces, while later updates brought the Dread, Cernos and Paris Prime which do much the same.
One of the longsword animations for a counterattack after a successful parry has your warframe stab your target through the chest with an upward thrust powerful enough to leave them suspended on your sword for a moment.
Improbable Weapon User: Grineer Flameblades and Corpus Prod Crewmen wield electrified clubs, and Grineer Butchers wield rusty cleavers; Grineer Scorpions wield Machetes. This, in spite of all the rocket launchers and assault rifles and laser guns and wahey lying about the place. They can still be surprisingly dangerous if they close to range, however.
Improvised Weapon: The Twin Gremlins are actually nailguns used bolting decks and armor plates to Grineer ships. Naturally, it also bolts Grineer to the decks and bulkheads with bone-shattering, armor-piercing force. Apparently, they're dual-wielded to make up for their lack of fire rate.
The Serro saws are used to tear apart derelicts and decommissioned ships for Corpus scrap. Rebels in their scrapyards also found it useful for tearing apart their Corpus slave drivers.
Infinity+1 One Bow: The Stalker's bow has become this as of update 11, with the decapacitation mechanic finally kicking in. It is now capable of dishing out critical hits of over 7,000 damage without mods upon fully charged headshots.
Any time a system boss taunts you through messages.
Interface Screw: The Ancient Disruptor's main attack used to subject you to severe interface screw (colour scrambling/inversion everywhere) and instantly drains all of your shields and energy. Somewhat reduced in 5.3/5.4 since it was a bit too disorientating/dangerous for those with epilepsy or similar conditions - now it mostly just scrambles the appearance of your HUD and disables part of it, rather than applying any trippy colour shifting. The Shockwave MOAs or anyone who can create shockwaves will create an orange, slowly expanding bubble that will shake your screen and generally suck.
Invisibility: One of the Loki frame's primary powers turns it invisible for several seconds. Attacking does not break this invisibility. Ash can Smoke Out and turn invisible for a few seconds, without attacks making him visible.
Invisibility Flicker: If using Shade on the other hand, attacking enemies with your weapons does cause invisibility to break. Very annoying when you're trying to Back Stab and sneak. For some reason, your abilities don't break cloak.
The Juggernaut: The Rhino. Like Frost it's very slow and can in fact show up to most fights too late to even help if it's paired with faster frames, but it's abilities can make it more or less untouchable. It's fully possible for well equipped Rhinos to walk up to bosses and causally beat them to death without ever taking damage.
Katanas Are Just Better: The basic sword a Tenno gets is a faintly organic-styled katana-esque blade. It's rather effective — though not the best sword by a long shot. All longswords and shortswords are wielded with the characteristic downward slashing motions.
Averted with the Dakra Prime, a sabre style weapon which has the potential to hit even harder than the Dragon Nikana.
Kick Them While They Are Down: Enemies will gladly knock you down and wail on you while you're struggling to get back up. But you can return the favour with a melee attack that's specially animated for stabbing downed enemies... or you can just shoot them in the face.
Kinetic Weapons Are Just Better: The ancient Orokin who created the Tenno and their weaponry (and who are technologically far beyond the Grineer and the Corpus) never bothered to develop infantry energy weapons, opting instead for guns that fire actual bullets. Their traps, however, sport laser and plasma based weapons that rival or exceed the power of anything the Tenno currently field - especially in Tier III.
The Dojo in Update 8 allows you to research Corpus weapons so that you can build and use them yourself, as well as Flamethrowers that the Grineer use.
Knockback: Present in all its forms. Most notable causes would be the Bo, Furax Gauntlets, and Fragor Hammer however, because any enemy killed by them will be sent flying. Rhino Stomp has the added effect of slowing time, so your teammates can use them as target practice, or you can leisurely smash them into pieces.
Large and in Charge: The bigger the enemy, the more dangerous they are. The bosses of each region are therefore the largest of the lot. Tyl Regor is taller than the Rhino and probably clocks in around eight or nine feet tall!
The Grineer Empire as a whole definitely qualifies. As can be seen during any engagement between them and the Corpus, such as the Gradivus Dilemma, they utterly dominate the battlefield due to their superior heavy armor and willingness to use more effective weaponry than Pew-Pew style Lasers, a willingness the Corpus aggressively refuse to share.
Laser Blade: The Gram and Plasma Sword use a pair of plasma blades mounted on either side of the weapon, allowing them to cleanly slice-and-dice enemies.
Large Ham: Councilor Vay Hek. As a propagandist for the Grineer, he is quite glad to take large bites out of the scenery and healthily chew on it. While not quite as hammy, his comrade Sargas Ruk is all too happy to boast in big grunts that he will crush those who oppose the Grineer.
Laser Hallway: More like laser threshold/door. Prevalent in Corpus ships. You have to either destroy a security camera, or wait for it to blink out. They strip your shields and do some damage to you if you touch them, and can only be passed with a couple of special abilities, lag spikes, or glitching the direction you're thrown in. It is possible to dash-slide through them given correct positioning and timing, but it is not entirely clear whether this is an intended feature or not.
More conventional Laser Hallways are in with Update 8 and the Void Tower missions. One optional timed segment sees you sprinting past a number of moving and stationary lasers, and requires a fair amount of parkour and/or high-mobility powers (Slash Dash, etc.) to complete within the time limit.
Le Parkour: Many such feats are simple for a Warframe. Wall-running and jumping, climbing, rolling, Vanquish-like sliding, and huge goddamn flips. They are required to access some of the treasure vaults found in the Void, and hidden locker rooms in Grineer asteroids.
Lightning Bruiser: Almost every warframe is something of a lightning bruiser, apart from one or two that are either too slow (Frost) or too squishy (Loki, Nova) to really qualify properly.
Special points to Ash, who is marketed as the offensive stealth class, with powerful offensive abilities as well as invisibility. Not as well known is that he has the highest health in the game, good shields, and the second highest armor rating, making him second in tankiness only to the dedicated tanks. He is also the second fastest frame behind fragile speedster Loki, and has a spammable teleport. Put it all together and you have the very model of a lightning bruiser.
Rhino, one of the aforementioned tanks, also gets extra points. By default he's tied with the other tank Frost for slowest and tankiest in the game. What puts him over the top is his Iron Skin ability, which makes him gives him temporary godmode (formerly on a timer, now on a damage cap), lets him shrug off all crowd control, and can be chained continuously, provided he has the energy. While he is usually slow, he can spam a charge ability to quickly move around the map, bowling over any enemies in his path at the same time, and proper mod setup and his alternate Vanguard Helmet can increase his movement speed.
For a literal lightning bruiser, look no further than Volt. Like Ash and Saryn having the most health, Volt has the strongest shields (alongside Mag, Rhino, and Frost). He has average health and run/sprint speed, but can put on a burst of Super Speed using one ability, and his others are all about Shock and Awe.
Living Weapon: Several weapons from Bio Research Labs are Infested in origin, giving them a very organic look and feel. Embolist in particular is explicitly marked as one.
Lost Technology: The Warframes and other Orokin constructs are significantly more advanced than even Corpus technology (which is derived from it anyway). In-game, Prime weapons and Warframes are stronger versions of those whose blueprints the Tenno can readily access and are largely made of recovered components instead of raw materials.
Losing Your Head: An unfortunate Excalibur-clad Tenno loses his head at the start of the new teaser trailer for Alad V and the Jupiter tileset.
Ludicrous Gibs: On top of already-existing gore effects (such as total gibbing from Rhino Charge), Update 7.9 brought new 'damage deformers' for enemies, which basically meant a significant increase the amount of gore. Expect to see many Clean Cuts if you're using a powerful bladed weapon, and most firearms can easily blow off limbs, pulverize heads, or take chunks out of torsos.
Machine Worship: Sargas Ruk has been using profits from hunting pre-War artifacts (by annexing everyone else's dig sites) to outfit himself with the latest and greatest cybernetic body modifications. There's also the Corpus, who have a bit of this going on. One of Sargas' taunts says it all;
Sargas Ruk:"Flesh is the flaw!"
However, the Corpus take the cake for this trope. They literally worship machines - namely, Orokin machines.
Made of Plasticine: Most mooks can be sliced and diced by edged weapons or have chunks blown out of them with firearms. The Flux Rifle especially tends to cause a lot of gibbing and mangling of bodies.
One of the upgrade Hyena modules will do this repeatedly - and as it's a boss fight, kiss goodbye to any replenishing energy spheres.
The reworked Vay Hek now also has a laser that he will use to deplete your energy in the first phase of his bossfight
Meat Moss: Ships infected with the Technocyte Plague have these disgusting slug/algae-like things covering the floors and walls. You can also see slightly more plant or web-like growths when on Infested-based Missions that use the Corpus Outpost and Grineer Asteroid Base sets.
Mecha-Mooks: The Corpus deploy MOAs and Osprey robots to back up their squishy crewmen, with both kinds coming in multiple flavours. Their foot soldiers are partially robotized, as well.
Mechanical Monster: The Corpus' Jackal warbot, quadruped beast armed with heavy shields, dual machineguns, vertically launched missiles, sticky grenades, and a Shockwave Stomp attack. ** The Corpus also have the Hyena pack and the Zanuka proxy bot line. Both of these are more nimble than Jackal, but still dangerous.
Mechanically Unusual Class: Vauban, the engineer warframe, relies on grenade-based and deployable abilities rather than his own Void-granted abilities. The difference is highlighted by Vauban's appearance - while the other warframes are generally sleek and form-fitting, Vauban wears a hulking huge helmet with a neck guard, and is "wearing" what appears to be a trenchoat and a high-tech jumpsuit.
Meditation Powerup: The special ability of Nyx, the psychic warframe. On activation, Nyx hovers in the air in the Lotus position, and absorbs all attacks, then returns them in the form of a highly damaging explosion. The more damage she takes, the more she unleashes — a brutally effective power against enemies that like to engage close up.
Mega Corp.: The Corpus, a corporation that controls every major trade route and flow of goods in the solar system. They won't let anything or anyone get in their way - Tenno or Grineer be damned - in the name of securing every last piece of precious Orokin-era technology. They're, according to in-universe information, deliberately patterning themselves on old merchant guilds from long ago in Earth's history, most of which were ludicrously powerful. All of their (brainwashed) employees talk in a disturbing, inhuman choke-screech and are partially robotized, which takes 'soulless corporation' to a new extreme.
Mêlée à Trois: As of 5.3, one faction can begin spawning in any other faction's missions. For instance, a mission that starts out against the Grineer may take a turn for the grim when Infested suddenly begin to spread throughout the ship, prompting the Grineer to begin fighting the Infested as well as you. Or you might mow down a ship's Grineer Marine contingent and start running into Corpus Crewmen, MOAs, and Ospreys.
The Grineer, Corpus, and Infested will also attack the mysterious Stalker, who is more than happy to return fire. You can take advantage of this to wear the Stalker down before facing them yourself.
With the release of the Phobos starchart, Grineer Settlements are also occupied by manta-like Desert Skates that will attack both the occupying Grineer and invading Tenno.
The Gradivus Dilemma takes this to the logical extreme with a full-out war between the Tenno, the Corpus, and the Grineer over the large cache of sleeping Tenno.
Taken Up To Eleven with Update 13.2's "Specters of Liberty" event: With the introduction of the allied Red Veil faction, Rescue missions will always consist of at least three factions. However, Corpus maps (even those invaded by Grineer) also have consoles that will spawn MOAs to fight for the Tenno, while the extra holding cells of a Rescue map also have a chance to hold an Infested enemy in captivity. Therefore, in one map, it is entirely possible to see up to 5 different factions fighting at once - and that's before Stalker shows up...
Mighty Glacier: The Rhino. It has the second (after Valkyr as of update 11) heaviest base armor of any warframe (reducing all damage to its health by 38%), very high shield and comes complete with charging and ground stomping attacks, but it's also painfully slow, sprinting just over half as fast as any other warframe. A team with a Rhino player in it can count on him chugging along far behind everyone else, often arriving long after everything has been killed off by the faster teammates. However, sometimes everyone else is dead and a good Rhino can easily solo a mission.
Similarly (and somewhat literally), Frost, who has the same speed disability, but has the same amount of armor, and utilizes AOE storms and beams of ice to damage enemies. He's more geared toward status effects, however, with his basic power being a damaging flash-freeze that works to slow down enemies (until they're damaged).
However equipping a fully leveled sprint mod and the Vanguard alternate helmet (25% more sprint speed in enchange for 5% power strength) turns him into a Lightning Bruiser that can keep up with a Loki.
Mirror Match: The Stalker, a mysterious high level enemy which may hunt you down in retaliation for taking down a boss. Uses several Warframe abilities and appears to be a rogue Tenno. He currently uses a Sinister Scythe and a strange bow with arrows that can decapitate a target, which can be used by the player.
With the implementation of clan battles over Dark Sectors, you may find yourself fighting a Tenno Spectre of a player who has the exact same or a similar build as you.
More Dakka: This is basically the Grineer's hat when it comes to combat. Their assault rifle (the Grakata) trades stopping power for a high rate of fire and good capacity, their sidearms - the Kraken and Viper - are a double-shot handcannon and a rapid-fire machine pistol respectively, and they make the Gorgon and Hek (see below).
One of the primary weapons is the Gorgon, an enormous machinegun that trades the usually graceful Tenno ways of killing for more bullets.
There's also the Furis, if you want more dakka in your sidearm slot - and you can get two (the Afuris), for double the pleasure. Or you can slot Fire Rate and Ammo Capacity mods into your guns.
And now you can get a dual version of the Viper pistol which has an even faster rate of fire than the Furis, but trades away accuracy. The Twin Vipers have the highest possible DPS of all the handguns currently in the game. Taken Up to Eleven with the Twin Vipers Wraith, which have even more dakka.
In an odd variant, the Hek is a quad-barrelled shotgun that unleashes a vast amount of pellets with every trigger-pull.
The Corpus recently got the Tech, who wields the Supra Energy Repeater. Essentially an 'energy bolt' version of the Gorgon, the Supra can be developed by clans in the Energy Research Lab. A close look at the model shows that it apparently has three barrels.
The Tenno have their own machine gun, the Soma, that has a hundred-bullet magazine, an extreme firing rate, and a high critical chance, at the cost of doing only 10 damage.
The Boar and Sobek are automatic shotguns.
The newly introduced Cestra and Dual Cestras are pocket laser LMGs in pistol size. The dual version features one of the highest fire rate with a huge magazine.
Ms. Exposition: The Lotus. She'll explain why she activated you, and she also provides information on your target during Assassination missions.
Mythology: There are lots of references to various flavours of classic mythology. The Grineer have a habit of naming their weapons for various mythological beasts. For instance;
Celtic Mythology: One of the Warframes is named Banshee, and she (unsurprisingly) uses sonic-based attacks and powers. During the Operation Sling-Stone event, the Grineer Fomorian-class ships also bore names of namesake creatures from Irish myth, such as Balor, Ethniu, Buarainech, etc.
Egyptian Mythology: The Sobek auto-shotgun is named after the crocodile-headed god of the Nile. Valkyr's alternate helmet is called Bastet, after the cat goddess of, depending on the region and age of Egypt, lotion, the sun, and war.
Greek Mythology: A Warframe is named after Nyx, the goddess of the night. Fittingly, her default color scheme is dark greys and blacks with a splash of dull green. The Grineer Gorgon is a heavy machinegun. The Tenno Orthos, a double-ended polearm, is likely named for Cerberus' two-headed brother, Orthrus.
Norse Mythology: One of the Warframes is called "Loki". Loki's abilities are mostly based around stealth, misdirection, and trickery, as opposed to directly harming enemies. There is also the Gram, a BFS named after the sword Sigurd used to slay Fafnir. Valkyr is named after the Valkyries, the psychopomps who take dead warriors to Valhalla, their afterlife of eternal combat. The Grineer also invoke Norse Mythology with the Kraken heavy pistol.
Persian Mythology: The Grineer-themed alternate skin for the Scindo is named the Manticore.
Mythology Gag: One of the updates included a Glaive - not a Blade on a Stick, but a flying triple-bladed thrown weapon, the same sort (but not the exact one) used in darkSector. Others from that game include a stealthy boss called the Stalker and "Jackal" Spider Tanks. Hostages also use the Tekna pistol.
Nail 'Em: The Bolto series, which include a rifle and pistol, fire stakes that pin enemies to walls. The Twin Gremlins are rivet guns made to bolt ships together, used by the Grineer... and the Tenno, who find that they work just as well as weapons to nail schmucks to the floor with.
Nerf: The 5.3 - "Blazing Embers" patch massively reduced the effectiveness of shield capacity warframe modifications by converting them from percentages of your current shields to percentages of your basenote for instance, say your base shields are 100, and your current shields are 300. A mod that once increased your shields by 50% of current now only increases them by 50% of base. So instead of having 450 shields (300 current +150/50% current), you now have 350 shields (300 current +50/50% base)., with the aim of making combat much more dangerous, and making shield regeneration and damage reduction warframe modifications more appealing. When you had 1,000+ shields, there wasn't really anything that could actually threaten you short of getting cornered and stunlocked by a mob of Infested Ancients.
Never Bring a Knife to a Gun Fight: Initially Subverted, since several of the warframes used by the Tenno are heavily armored with strong shields and eventually enormous hitpoints, so that closing the gap and bisecting foes with an Absurdly Sharp Blade can often be a far more viable tactic than a standoff shooting match. But then it's back into full effect later on, where enemies can easily tear you apart if you're overconfident.
There are also two throwing knife weapons named Kunai and Despair. They're more effective than enemy machine guns, laser beams, or rocket launchers. A later update adds the Castanas, throwing knives that can be remotely activated to electrocute enemies.
Update 13 allows players to solely use melee as a means of combat. Parrying allows Tenno to deflect incoming bullets long enough to close larger distances, and combos allow the skilled to stun enemies up close. The implementation of a damage multiplier that could potentially triple your melee damage should you get enough hits in a short enough time. If that wasn't enough, Channeling into your melee weapon allows you to convert energy into even more melee power that, in most cases, literally vaporizes enemies.
New Game+: Once you max a frame or weapon to level 30, you can use a 'Forma' (a piece of Orokin technology) to Polarize it. Polarizing lets you alter the polarity of any slot, which means that mods with a matching polarity cost less mod energy to install, but resets the item back to Unranked so you have to level it up again. You can Polarize an item several times if you wish (the only restrictions being the Forma required each time), to fully customize and optimize your equipment to suit your playstyle and preferences.
Nice Hat: Grineer Commanders have a pretty fancy pope hat-esque thing going on. There's also Frost with his odd iceberg cap, and all Prime warframes have an Orokin doodad hanging off their head.
Headgear is also one of the primary means of differentiating general Grineer soldiers from each other - shotgun-wielding Troopers and flamethrower-toting Scorches have wide and fairly flat caps with one 'eye', Commanders have the pope hat, normal Lancers have facemasks (or no mask), Napalms and Bombards always have facemasks, desert Lancers have hoods, etc.
No Arc in Archery: Yes. Yes there is. When making long-range shots with the Cernos, Paris or Paris Prime bows, you'll have to adjust for arrow drop that can turn a headshot into a gut-shot. Dread is notable for flying much straighter than Paris, at the cost of not being armor-piercing. Kunai and its variants (Despair, Hikou) also have a drop, though it's less noticeable than the arrows, exception of the Despair. The Torid also has this issue.
No OSHA Compliance: Grineer ships have what appear to be exposed energy cores and engine function and walkways lacking railings all over the place.
Corpus facilities in Jupiter make it possible to fall off into Jupiter's atmosphere, walk into big beams of energy, fall off of long bridges into chasms, etc.
No Points for Neutrality: In the Gradivus Dilemma event, you have to pick a side to support more. If you try to support both Corpus and Grineer equally, the points will cancel each other out and you'll get no reward at all.
No Sell: The Stalker is immune to most Warframe abilities, except for direct damage-dealing abilities. The Rhino Stomp, for example, will hurt him but won't stun him and throw him airborne like regular mooks.
Notice This: Corpus storage containers shine, Grineer storage containers have two glowing lights and modules give off blue sparks.
Not So Different: Alad V says this almost outright when you help the Corpus during the Gradivus Dilemma;
Alad V:"You and I aren't so different, Tenno. We both know these dogs need to be put down. I sense we are at the beginning of a beautiful new partnership."
Similarly, Ruk states that the Grineer are the Tenno's best ally in the conflict; a reason he may give for doing so:
Sargas Ruk: "Tenno, of course you side with us! Of course the Grineer are your best option! We share your joy in Corpus death!"
One-Man Army: A lone Tenno will leave dozens upon dozens of enemies strewn in his or her wake during an average mission. A four-man cell will have hundreds of dead people bisected as they continue to rip apart the rest of the ship..
Most humanoid bosses teleport, but they do it much more often if the camera is facing away from them (usually if you're running away), and usually from behind or to the sides.
The game usually spawns mooks only in places you aren't currently in, but it gets to this level when there's no other way they could have reached the room they appear in.
One-Hit Polykill: Punch-Through mods allow your bullets to pass through terrain to strike foes in cover, and also allow your shots to strike multiple enemies... so if they're lined up just right, it's entirely possible to score multiple headshot kills with a single projectile. The Paris bow and Throwing Knives can do this with no mods necessary, even.
One Stat to Rule Them All: Before Update 11 brought Damage 2.0's revamps, Armor Piercing was the damage type you had to boost if you wanted to be relevant against higher-level enemies.
Only in It for the Money: The Corpus will always work to protect their bottom line, to the point of working with the Tenno against the Grineer one week then working with the Grineer against the Tenno the next week despite hating both factions vehemently. The Tenno themselves invoked this during the Gradivus Dilemma, where factional warfare was often decided by who paid out better in the end.
Sargas Ruk taunts the Tenno who come to kill him as 'just another Corpus drone' fighting for nothing more than money.
Invasion outcomes are almost universally decided by which faction is offering more in battle pay.
Personal Space Invader: Leeches launched by Leech Ospreys will drain your health until you knock them off by swinging your melee weapon. Latchers launched by Grineer Seekers can only be taken off by rolling.
Pink Mist: Blasting Grineer melee troopers in the head can pulverize said head and thus leave little but a stump of a neck behind. Also (as mentioned above), headshots that don't kill one of the common Infested have a chance to blow out a nice big chunk of their upper torso along with taking off their head!
Playing Both Sides: The Tenno in the Gradivus Dilemma event. The Tenno that fought with the Grineer did so to rescue their comrades. The ones that fought with the Corpus did so to weaken the Grineer, and when the event was over the Lotus tells you that a retrieval team was already heading to rescue the captured Tenno anyway.
Playing with Fire: The Ember warframe, who can use various fire powers to incinerate lightly-armoured foes. Her powers are devastating when used against the Infested due to their fire vulnerability.
Power Creep: Weapons are infamous for this, particularly before Damage 2.0. For example, compare the older Vulkar sniper rifle to the newer Vectis - the Vectis is significantly more powerful, ammo efficient, and crit-seeking. Damage 2.0 brought some sense back the balance, with the introduction of more stats to modify other than "it does more damage/ammo/rate of fire" that lead to Damage 1.0's power creep. However, Prime versions of older weapons take this to the next level.
Power Nullifier: The Stalker has an ability that lets him remove any Warframe buffs, such as Rhino's Iron Skin, stunning the player in the process. One of the upgraded Hyena models has the same ability.
Precursors: The Orokin, apparently. They once had a whole civilization before the Great Offscreen War in the background of the story, but now they're gone, and only relics remain, plus the tower that the Tenno use as base. If the codex for the Stalker indicates anything, the reason they're gone is because the Tenno killed them all.
Protection Mission: Defense missions, which see you defending a cryopod (or Orokin Reactor, or other various objectives) containing a Warframe against waves of enemies. Fortunately, the pod/reactor regenerate their shields and health fairly quickly if you can keep the enemies off it, making the missions reasonably easy.
Psychic Powers: The Nyx Warframe uses these to make enemies fight for you, launch a volley of telekinetically-guided force-bolts, and cause all nearby enemies to attack each other at random. The Phorid also has similar bolts.
Punched Across the Room: Actually justified with the Obex, which are essentially gravity-displacement knuckles that hit like a truck.
The Supranote Latin for 'Above' as well as sounding like 'Super' has the highest raw DPS in the game.
Puzzle Boss: The Jackal has a super-shield on its torso that effectively nullifies all incoming damage, and thus its health can only be depleted if you reduce one of its legs to zero health; this causes it to fall over and disables the super-shield, rendering its torso vulnerable for a few seconds.
Quantity vs. Quality: A handful of Tenno, specially trained and superiority in weapons, versus hordes of degenerating clones and brainwashed mooks.
Ragdoll Physics: Enemies launched skywards by Vauban's Bounce pads will ragdoll helplessly until they land, giving you time to shoot them out of the air — this is on top of enemies ragdolling on death, which can lead to situations described under Blown Across the Room above and Railing Kill below.
Railing Kill: Get yourself a Bo, find a big group of Grineer, and fight them in one of those rooms that takes place on a big catwalk. Go on, it'll be fun.
Rapid-Fire Fisticuffs / No-Holds-Barred Beatdown: The animation for attacking a knocked-down enemy with fist weapons like the Furax has your Warframe pounce on them and punch them as many times as possible, which usually results in them exploding.
Rare Random Drop: The Blaze mod and the Sunlight & Moonlight Jadeleaf stands out for many. Additionally, anything you seek will typically be much rarer than it should be. Prime components, corrupted mods, Warframe or weapon parts comes to mind.
The illusive nemesis' (Stalker, Harvester and the Grustrag Three) all have special drops. They are also quite hard to encounter, and while you are guaranteed a drop, you might not get what you need.
The Kubrow Egg, which is required as part of the Howl of the Kubrow main quest. The average rate appears to require destroying 50-200 Kubrow Dens, although you could instead bribe your way past the quest by purcashing an egg for a modest 10 platinum.
Red Eyes, Take Warning: The visor of Sgt. Nef Anyo's helmet is vivid red, although it can be a little hard to see. All other Corpus Crewmen have blue visors.
Regenerating Shield, Static Health: Without a Rejuvenate Artifact or Regenerate Health mods for your Warframe, Health can only be recovered by picking up red Health Orbs, using a Health Restore (that has to be equipped prior to the mission), or by being healed by an ally. Shields, however, regenerate by themselves.
The Remnant: The Tenno, the only living legacy left of the Orokin's reign - or so it seems. The Stalker's codex hints that he's part of another Orokin warrior caste - one that defended the Orokin, instead of attacking for them. The reason he wages war on the Tenno is because the Tenno murdered the Orokin.
Required Secondary Powers: Elemental-themed Warframes aren't immune to their own elements eg. an Ember can take fire damage from environments or Grineer weapons, a Frost can have his shields reduced or be slowed by cold, and a Volt can be harmed by shock prods or the electrified water in derelicts.
Return to Shooter: An ability available to the Mag Warframe and a certain boss, which causes bullets from the victim's firearms to strike them instead. It doesn't interfere with melee attacks or abilities, though.
The Reflection module effect is a minor variant of this.
Revolvers Are Just Better: the Vasto revolver is easily one of the best sidearms in the game, being much faster than the Lex, and doing more damage than the default pistol.
Rocket-Powered Weapon: The Jat Kittag has a pair of jet engines mounted behind the hammer head, allowing it to attack almost as fast as a regular weapon while simultaneously stunlocking the enemy. With the Crushing Ruin stance, the rockets can be engaged to launch the player forward while spinning the hammer to murderize anything in the way. Ground-slam attacks will send enemies flying across the room.
Sadistic Choice: The Gradivus Dilemma was trying to create this for the players. Either support the Corpus, sacrificing a number of sleeping Tenno they managed to get their hands on, but prevent the Grineer from growing stronger. Or support the Grineer to free said Tenno but allow them to grow stronger creating an imbalance of power in the solar system. Players were less than happy when they didn't get a third option.
To make the choice all the more problematic in hindsight. A new trailer shows Corpus leader Alad V. cutting an Excalibur Warframe with Tenno inside in 6 parts to sell them individualy, hinting on the fate that would have been possible for the sleeping Tenno.
Second Hour Superpower: You don't get to equip your first ability until you gain a level. The game's a standard TPS before then.
Unless you have an Aura mod which when fully leveled can get you up to 14 mod point boost at level 1, allowing you to equip some of the abilities from the start.
And now as of Update 11, first abilities are now free, and do not have a cost to equip.
Sequel Number Snarl: Update 11.5, which included jungle tilesets on Earth and the Oberon Warframe, was not preceded by an Update 11.4. Justified, as they spent over a month hyping its release and wanted to finish it before taking a holiday break.
Set a Mook to Kill a Mook: Nyx' Mind Control and Chaos powers allow her to turn enemies into temporary allies, or cause all enemies to attack each other at random. Mind Controlling the Heavy Gunner or Bombard at the back of a Grineer squad can be very effective - or you can use it to make Infested turn around and kill their own medics!
The combined elemental 'Radiation' does the same effect, but only on enemies closest to the target.
Shield-Bearing Mook: Grineer Shield Lancers. Whilst the shield is largely immune to small arms fire, it won't stop bullets with Punch-Through properties. The Shield Lancers themselves are relatively squishy, but have a nasty automatic pistol and can smack you with their shield to knock you down. Repetitively. Shield Lancers are not popular with the player base due to their habit of turning Tenno into pinballs.
Tenno will get themselves into the shield action as well, having access to the Silva and Aegis.
Shockwave Stomp: Shockwave Moa and Grineer Heavies. Certain bosses can do it too. The Shockwave Moa's is unusual in that the wave travels along the walls/floor/ceiling, and can be jumped over. Players can jump and melee for their own version (which varies in effectiveness depending on the melee weapon used; a massive battleaxe will send enemies tumbling, while attempting the same with a dagger is... ineffective), and the Rhino warframe also has one as an ability.
Shotguns Are Just Better: ...for that reason, the Hek and Strun Wraith are often considered the overall best guns in the game. The former has a very high mastery level required to unlock, while the latter was only available as part of the Survival Weekend event and does much more damage than the default Strun. Brakk used to fit in this category, having both a long range, extreme damage to all factions (damage calculation tended to give each individual pellet a damage upwards of 20) and a balance of stats, but was Nerfed in 11.2.1 to have more damage falloff at range and a slant towards Impact damage.
This trope still applies in a more general sense, as shotguns offer good damage, and very good ammo efficiency, as they usually require far less shots to down a target than a rifle, with the same rate of ammo drops.
Shout-Out: Internal and highly complicated. Early on, back in 2004, Digital Extremes had drawn up a design document for a very ambitious game which they called Dark Sector. Unfortunately they simply couldn't manage to successfully pitch it to any publisher in its state at that point, and so it went through multiple revisions until it turned into the darkSector that was actually published in 2008. Warframe is DE going back to their original design document and finally designing the game they wanted to make all those years ago. This article explains it all in more detail.
The 5.4 closed beta update was called Hammer Time. Also, it adds a giant hammer.
A subtle, fairly-easy-to-miss one; a mission/zone in the Mars region is named Ultor.
The iconic Glaive weapon from Dark Sector (itself a Shout-Out to the movie Krull) was added to the game as a usable weapon. The description is also a shout out to the game by calling it "the weapon of the first Tenno".
The Tekna 9mm, the default pistol, is used in escort missions as a place holder for the hostage's weapon.
The Miter blade launcher both references Unreal I and Unreal Tournament (the latter of which Warframe was meant to be a sequel to), being a gun that fires out slow-moving sawblades, and closely resembles Tribes' iconic Spinfusor, which also fires discs, albeit energy ones that explode. The Drakgoon shrapnel cannon and Stug goo-launching pistol are also extremely similar to their Unreal precursors (the Flak Cannon and GES Bio Rifle, respectively).
The Quanta takes after the Shock Rifle, firing slow-moving energy cubes that can be detonated with the primary fire mode.
Update 10 introduces scarves to our merry band of space ninja, similar to the ones seen in Shinobi and Strider.
A new weapon from Update 10 at first looked like it with the name Dakka Prime. though this turned out to be a longsword and more a reference to the city of Dhaka. After players complained about the misleading name it was renamed Dakra Prime.
Slide Attack: Generally more powerful than regular attacks, and are easy to pull off. When used with Dual Zoren, a handy way to get around.
Slippy-Slidey Ice World: The Corpus Outpost set, consisting of a set of Corpus Outposts and structures built into a big ol' snowy and mountainous landscape. Fortunately it's not slippy or slidey, but there's definitely a lot of snow and ice. There's also the 'ice' enviro-hazard, which halves your shield capacity for the duration of the mission. Yes, you can have the ice hazard on the Corpus Outpost set.
Smoke Out: An ability of the Ash warframe (also used by a couple of the bosses) makes the user disappear in a puff of smoke and renders them invisible for a few seconds. It also staggers all enemies in a small radius around the user, so it's very useful for making a quick getaway.
Smug Snake: Alad V., a Corpus goon who works directly for its board of directors. During the Gradivus event, siding with him will have him passively aggressively taunt the player over the soon-to-be loss of the Tenno that he managed to kidnap from cryosleep. Fighting against him will have him offer you twice the payment of whatever Sargas Ruk's paying you to beat the hell out of his forces.
So Last Season: The PS 4 trailer shows Volt shooting at a Zanuka with a Soma, but to little effect. This is reflected by Damage 2.0 (introduced in the same update as Zanuka) making the Soma not-so-top-tier.
Sniper Pistol: The Lex handcannon is pinpoint accurate even over long range. Though it lacks a proper scope for optical zoom like the Snipetron or Seer, it can be a very effective sniping weapon. The Lato Vandal has similarly high accuracy. You can also potentially turn any side-arm into this, provided you use a mod that increases the zoom distance.
Speaking Simlish: Whenever the commander of the enemy forces in a solar system taunts you, it's in this, despite in-game phrases being translated to English. Grineer ship markings are also a strange language. Eventually, both Corpus and Grineer mook will have their own languages and will use it instead of English. Grineer foot soldiers already had their language update, and the Corpus one is in the work.
Sprint Meter: Stamina. Depletes when you sprint or block, replenishes at all other times. Jumping or fighting in melee costs Stamina, but doesn't stop it from regenerating. Some mods affect how fast it recharges and how much you can store.
Good Bad Bugs: If you crouch while sprinting you forward slide for one second at sprint speed, but since you aren't running, the Sprint Meter refills. This can really help you dash around in a fire fight.
Averted with Zephyr, which actually looks like she is wearing an armor, and whose gender can be quite ambiguous to uninformed Tenno.
Sticks to the Back: Melee (exception of both fist weapons) and primary weapons stick to the back, whilst pistols and kunai holsters stick to your hips. Advanced technology is involved, so it's probably excusable.
A particularly notable variant is the Glaive, which Sticks To The Forearm, without even being placed there. It just... retracts.
Stuff Blowing Up: The Tenno decided things would be more fun if they had rocket launchers... so they reverse-engineered the Grineer ones. You can guess what happened next, right?
The Nova Warframe specializes in this, having one ability that fires an explosive which can absorb and reflect damage, and an ultimate ability that turns enemies into bombs when they die, starting off a chain reaction of explosions.
On the enemy side of things, quite a few bosses have some sort of bombardment - both Raptor and Jackal unleash a flurry of homing missiles that explode a good chunk of the arena, and Kela carries an Ogris.
Stun Prods: Corpus Prod Crewmen and Grineer Powerfists both use electrified clubs/shock prods to attack you. The Prod Crewmen don't do a whole lot of damage, but the hits have a high chance to make you stagger, leaving you open to other attacks or followup strikes. Powerfists are just Glass Cannons with the swing speed of a Mighty Glacier - huge warmup time, but they hit hard. The Tenno can also use these in the form of the Prova baton - devastating against Corpus, but usually less so against other factions.
Super Prototype: The Prime equipment (Excalibur Prime, Latron Prime, etc.) has vibes of this, being the original designs from the Orokin era as opposed to the derivative equipment that modern Tenno craft with their own hands using lesser materials. The power level of the Prime equipment varies wildly by items - Prime Warframes, for example, have one affinity slot and a special Orokin helmet, while the weapons will have at least one advantage, however minor, over their regular counterparts. For example, Glaive Prime flies slightly faster - compare to the Braton Prime, which is superior to nearly all assault rifles.
Sword and Gun: The Tenno are stated to be masters of sword and gun combat.
Sword Lines: All melee attacks tend to have a brief blur/distortion, but the effect can be made more pronounced by enabling permanent melee weapon trails or channelling energy into your weapon. The exact effect also varies from weapon to weapon; plain swords like the Skana have a clean and simple trail, the Fragor and Galatine have thicker and more jagged trails that give them a more powerful feel, whilst the Prova shock baton has four individual trails with an electricity-esque aesthetic.
Technicolor Ninja: The colours available to the Tenno to customize the appearance of their warframes and weapons range from pure black to pure white. So you could be stealthy, with muted tones and subtle colours... or you could be lime green with hot pink highlights and dark blue glowy bits.
Teleporters and Transporters: The Loki Warframe can unlock an ability that allows it to instantly switch places with enemies, teammates, or the Hard Light decoys it can create. Creative players have learned to use this to teleport across large rooms and thus easily bypass hordes of enemies, or annoying/time-consuming map segments, amongst other things. The Nova skips a step and just creates one-way portals between locations. The Ash Warframe may also teleport himself into melee range of an enemy.
High-tier Grineer melee troopers can teleport close to get the drop on you, and Grineer Captains can do this to the player - often to dump them in a room with a Heavy Grineer or in the middle of a pack of shotgunners.
Terraform: Corpus outposts on Venus and Mars are set in snowy areas, strongly implied to be due to the Orokin. Earth itself was turned into a gigantic jungle to preserve the cities underneath the flora.
To the Pain: Hyena packs are programmed with rather brutal defense and offense mechanisms, as they'll be glad to announce to you. Close-quarters combat? Evisceration.
Too Dumb to Live: Alad V. has shades of this. From provoking the Grineer into open war to insulting Tenno who are willing to support him. All resulting in the Trauma Conga Line detailed below.
Trauma Conga Line: This has not been a good month for Alad V. First, he kicked off a war between the Grineer and the Corpus by trying to steal Tenno cryopods, and was an abject failure at swaying the Tenno to his side. The board promptly withdraws funding for his war, leaving him in massive debt, and an angry CEO sending the Tenno and Corpus personally after him to collect what's due. The Tenno find him, smash the crap out of Zanuka and free the remaining Tenno, and personally give him a discount on their ammunition supplies.
Done indirectly through the usable lasers in Orokin Tower Defense. In fact, it's fair to say that most Tenno casualties in T1D are caused by someone activating a laser.
Proccing the Radioactive status effect on an enemy will make him turn on his allies very quickly and vice versa.
Universal Ammunition: There are four ammo types - pistol, rifle, shotgun, and sniper - Color-Coded for Your Convenience. How universal is it? All sidearms/secondaries share the 'pistol' ammo type. Possible secondary weapons include; a handcannon, a pocket shotgun, a pair of bolt pistols, or throwing knives, just to name four of them. A Grineer Assault Rifle and Corpus Plasma Rifle can even run off the same rifle ammo pack. Despite the fact one shoots bullets and the other shoots plasma bolts.
Unobtanium: Common materials seem simple enough - for example, "Ferrite" could be some kind of future iron alloy. But then you get into Detonite, Fieldrons, Orokin Cells, Neurodes, Morphics, etc.
Worst off are the Mutagen Samples, which as of Update 10 can only be obtained from the Orokin Derelict missions.
Unorthodox Reload: Many weapons don't actually swap magazines/batteries/whatever when reloaded; the Boltor has a lever that apparently reloads an internal magazine, the Synapse is tickled, the Ogris has a pair of buttons to be smacked in, et cetera.
Used Future: Grineer galleons, their space vessels. They're spotted with rust, are grimy, and dirty. It's stated they rely on ancient technology over and over, which is why their weapons also look so old.
Useless Useful Stealth: Update 7 introduced Back Stabs. However, there are enemies that are either outright Kung Fu Proof or otherwise too durable to be One Hit Killed with them, which thus leads to the attackee in question setting off an alert. Furthermore, there is no exp bonus for doing stealth kills or a full Stealth Run other than an occasional challenge. This is counterproductive to your leveling, since you would normally want more enemies to kill for more exp.
Video Game Caring Potential: Update 14 included the ability to breed and raise Kubrows, which are essentially large dogs. Players are allowed to pet their Kubrows when they're inside their ships (and required to, to build a strong enough companionship to take them into the field).
The War Sequence / Big Badass Battle Sequence: The Gradivus Dilemma, featuring huge-scale, epic battles between large hordes of Grineer and Corpus, with the Player in the middle, fighting for one side or the other.
We Need a Distraction: The rationale for Survival missions - the player's cell has to distract the stage enemy while another group of Tenno, "Alpha Team", conducts a raid offscreen.
An Axe to Grind: Scindo, a gigantic double-bladed axe - the head is wider than the torso of most Warframes. Also, the Dual Zoren; a pair of smaller axes. The Ether Reaper, despite its name, resembles a great axe much more than a scythe. The Dual Ichor are considered axes by lore, but they resemble heavily cancerous bone shaped into short swords.
BFS: The Gram, which is a massive greatsword with laser edges; and the Galatine, a massive claymore-style sword taller than the Tenno who wields it.
Drop the Hammer: Fragor, a gigantic hammer - like Scindo, the head is almost as big as the wielder's torso! It also comes in a spiked version, used by the Grineer - and one of their commanders, Lech Kril, a brute obsessed with with own hammer. Now featuring the Jat Kittag, as a Jet Hammer.
Flaming Sword: The Silva sword bundled with the Aegis shield. The blade is made of fire, after all.
Knife Nut: Various flavors of dagger, either alone or in pairs. Variations includes cleavers and throwing knifes.
Power Fist: Furax, Kogake, Obex and Ankyros. The Furax in particular are an uncomplicated demonstration of this trope. The Kogake and Obex are a little more subtle, whilst the Ankyros are much more ornate and flashy.
Sinister Scythe: The Hate, Reaper Prime and Ether Reaper - though the latter two look quite the opposite of sinister. The Hate, on the other hand? Totally sinister; it's used by the Stalker. The Kama (and Dual Kamas) is a much smaller scythe.
Whip It Good: The Lecta is an electrified whip of a distinctly Corpus design. The Scoliac is the Infested's take on a whip.
Weapon Twirling: The staff weapons feature a bit of this, but the scythes are the king of this trope. Every attack is followed (and sometimes started) by your warframe spinning the massive weapon around in one hand.
The Jat Kittag brings this trope to a new extent: the weapon is twirled around by the Tenno several time before spinning around with the weapon itself, at great speed. This is due to the jet engine built into the back of the head.
We Have Reserves: The Grineer's philosophy, where due to their cloning technology they'll just keep hammering out more clones to send into the meat grinder against the Tenno.
The Corpus are not far off either, since most of their troops are either mass produced walking turrets, flying drones or brainwashed slave workers.
Wolverine Claws: One of the weapons introduced in update 13.9.0, Venka, is this.
Woman in White: Female prisoners. Nova's default scheme is also white - fitting, given her theme of stars.
Zerg Rush: The Grineer apparently rely on this in war. Due to overuse of cloning technology their troops are degrading biologically, and it's mentioned in the backstory that once they rediscovered cloning they conquered Earth through sheer numbers.
The Corpus Moa robots are another good example. Their favorite tactic is to bunch up into a nice little horde and then charge across the battlefield and pour plasma bolts into you in full auto at point blank range. This is made significantly worse if there's a Shockwave Moa to knock you to the ground or a Railgun Moa to repeatedly throw your balance off.
Infested come in massive numbers, more than the usual squads of non-Infested.
Expect any defense mission to turn into this, regardless of Faction.
Solo missions tend to send hordes of enemies barreling your way.
Zombie Apocalypse: The Technocyte Plague, some sort of biological superweapon unleashed by the Orokin in a great war thousands of years ago.