The YMMV for VideoGame/ArmoredCore.

* ComplacentGamingSyndrome - Hope you liked shotguns and chainguns online in pre-patched 5!
* CompleteMonster: Old King is a member of the group Orca, and sticks out amidst a group of WellIntentionedExtremist types in that he's a genocidal OmnicidalManiac who simply wants to kill everyone in the colonies ForTheEvulz. In his worst moment, he tricks [[ManipulativeBastard the hero into destroying one of the colonies for him]] which brings about 100 million deaths.
* CrackPairing - Shipping is rare in the fandom, but when it occurs it will invariably be this due to the [[FeaturelessProtagonist impersonal nature of the series]]. Usually between the (usually male) protagonist and [[MissionControl their (usually female) operator]] or an optional [[TokenGirl token female]] wingman that can be hired for one or two missions. ''[[FoeYay Last Raven]]'' [[FoeYay protagonist/Zinaida]] is also somewhat frequent, but the most popular by far is ''For Answer'' protagonist/[[EnsembleDarkhorse May Greenfield]].
** As far as operators go, at least in ''Armored Core 2'' the player's operator is shown to become quite attached to and concerned for the player over the course of the game, and AC 4 protagonist/Fiona Jarnefeldt is pretty much canon. Other times though, the operators are just as characterless as the player.
* CrowningMusicOfAwesome - We have a [[http://tvtropes.org/pmwiki/pmwiki.php/AwesomeMusic/ArmoredCore page ]] for it.
* EnsembleDarkhorse - May Greenfield, from Armored Core For Answer. As an entirely optional wingman, May has the bare minimum of characterization and a player can go through the entire game without even encountering her once. However, fans have apparently fallen in love with what little characterization she has, as a cheerful teenage girl who pilots a bright green MightyGlacier engine of destruction. With a smiley face logo.
** [[ThatOneBoss Nine-Ball]] [[BestBossEver probably]] [[WolverinePublicity counts too.]]
** Jack-O is strangely popular in Japan with him appearing as a buff man with his AC's head wearing nothing but a piece of cloth on.
** For Answer White Glint.
* EarWorm: What some think of [[http://www.youtube.com/watch?v=2KpKUIC2asI Evergreen Family]] theme music in ''V''.
* FridgeBrilliance - The name "Nine Ball Seraph." The Seraph rank among the most powerful of angels, yes; however, there's more to it than that. The Seraph(im) are also the '''9'''th choir of angels.
** How can Nine Ball fire his shoulder cannon without kneeling (ignoring computer cheating)? He/It's an AI, and automatically gets Human Plus benefits.
** Why Genobee do the same thing in ''Nexus''? He's an AI too.
** The chapter titles in ''Armored Core 4'' are named after AgathaChristie's novels. The default name of the player character in both AC4 and FA is [[NoNameGiven Unknown]], AKA, "U.N. Owen", the alias of the murderer in ''AndThenThereWereNone'', which serves as the title of the final chapter of the game.
** Why does Wonderful Body move in the way does? Because he was a Normal pilot and Normals are basically Armored Core's from the older games. (ie: he stops boosting to save energy)
** How can the Chief keep firing the Giga Cannon Overed Weapon over and over without fail? [[spoiler: because he's also an AI.]]
** How do you end up using Junk Parts at the beginning of Armored Core V, when the intro has you using second generation parts? Since the Story Missions are technically flashbacks, it is highly implied that whatever you were piloting was actually destroyed and you had to make do, starting all over again at the beginning of Order Missions.
* FridgeHorror: the last words of the "deranged" raven in the Destroy plus escapee mission " R...raven.....watch...out....YOU..too"... sounds like the ravings of a paranoiac, right? think about em AFTER reaching the endgame, and what happens if you get killed after the corporate wars end..... [[spoiler: instead of going back to the nest screen, you see a short cutscene of a computer showing all of your Player characters information, identy records, proof of even EXISTING, being erased....]]
* GameBreaker - Almost every Armored Core game has one (or several).
** A recurring one is the Moonlight LaserBlade and Karasawa Laser Rifle. In ''4'' and ''For Answer'', Kojima weapons.
** Reg 1.00 of for Answer has this with [=SALINE05s=], White Glint's multi-missile launcher. Unlike other launchers, these ones have very good homing ability and most of the time, all [[RecursiveAmmo 8 submissiles]] will hit the target. Firing them in rapid succession to an enemy NEXT will deplete their Primal Armor, at which the missiles will [[ForMassiveDamage do double damage]]. One simply needs to use two of these in Reg 1.00 to [[strike:easily]] cut half of the difficulty in [[ThatOneLevel Arteria Carpals, Hard mode]]. Of course, that kind of gamebreakerness is not allowed and since has been nerfed.
** In ''AC4'' and ''For Answer'', Grenade Launchers come into this territory (doing huge damage and area damage, only slightly less useful against the faster enemies), and blades do wicked damage against arms forts.
** Also the finger machine gun in ''Project Phantasma'', the has an incredible rate of fire, does massive damage, has a ton of ammo and is extremely light, but in got nerfed in ''Master of the Arena''. They they brought it back in ''Silent Line''.
** Chainguns and shotguns in Armored Core 5 both of which can destroy any AC build with ease and take away all the difficulty of the final boss, thankfully the next patch will be nerfing them.
** [[http://ravenrepublic.net/2009/10/13/10-most-overpowered-weapons-in-armored-core/ This list]] talks about overpowered weapons in the old era Armored Core games, and while the Karasawa and Finger are obvious listings, some surprises come in the form of two different handguns [[HandCannon that have the strength of a rifle]] and can [[KillItWithFire heat up an AC like a mother]], as well as a sniper rifle with instantaneous lock-on time, a lightweight rifle with lots of ammo [[DiscOneNuke that was immediately available at the shop]], and a machine gun that allows players to rip up enemies thanks to a ludicrous muzzle velocity rating. Oh, and for the aforementioned hand guns? [[GunsAkimbo They also have left arm variants, which means double the attack and heat.]] [[ThereIsNoKillLikeOverkill Hope you have a high-cooling and anti-shell mech that isn't a tank.]]
* GermansLoveDavidHasselhoff - Although the Armored Core series is somewhat big in Japan, in North America it's a perennial niche title. So niche, in fact, that Agetec could no longer afford to localize the games after Last Raven and lost the rights to Armored Core 4 to Sega. Sega in turn dropped the license after Armored Core 4 failed to meet sales expectations. UbiSoft then snatched up Armored Core for Answer, but it failed to meet expectations as well... Are you noticing a pattern yet?
** It would help if they could advertise for it a little more...
** In this case, it would be a curious mix of [[ScrappyMechanic gameplay issues]], [[{{Sequelitis}} how well the series does in general]] and [[HypeBacklash new players being inconvinced as usual]]. Imagine, being able to afford a mecha game is as good as able to afford a game, so players in general expect a fun gun time. However, since PS2 games failed to implement Dualshock analog sticks control schemes (which would comply well to players of FPS control schemes) until ''Nexus'' (the ''fifth'' PS2 game), and the general gameplay can be broken down between CripplingOverspecialization and ExcusePlot to the point that the series is a brewery of a miniature ClicheStorm, at this point it would be very hard to convince someone new to ever try another VideoGame/ArmoredCore game.
*** Armored Core 5 is now being localized by Namco Bandai.
** In a reverse example, if any comments on Niconico are to go by, Japanese players laughed at the inept translation errors that was abound in Armored Core: for Answer, but they absolutely in love with the full range of English voice cast, whether it's GA rep's hammy voice, to Shamir Ravi Ravi's murderous voice, and of course, the various accents that Canis, Dario Empio and Do Su employed. They don't even seem to be bothered by the massive change in voice type that Ay-Pool has.
* HarsherInHindsight: Poor, poor RD. His only wish is to survive the whole big conflagration that is the Resistance vs. Father war. His big sister figure makes fun of him, his allies only think he's useful because of his sixth sense, and nobody pays him any attention. Small wonder when the Corporation offered him a chance of survival and an AC of his own while telling him that he's special, RD promptly tries to kill you. In the end, after you defeat him for the last time:
--> "They told me I'm special...I don't want to die!"
* HilariousInHindsight: RD is a NervousWreck deep down, [[spoiler:backstabs his/her friends]], is frequently admonished by TaraStrong's character, and is regarded by some of the fans as a shallow person. [[WesternAnimation/MyLittlePonyFriendshipIsMagic Now, which franchise does this character belong to?]]
* MoralEventHorizon - For Answer, Ending C.
** If you needed any more implication that ''every last one'' of the Corporations in the ''4'' series are full of serpentine bastards, it will be gone after the last mission of Armored Core 4. Why? Their thanks for you taking down Rayleonard and saving their collective hides is [[YouHaveOutlivedYourUsefulness trying to kill you for it,]] [[DoomedHometown after burning your colony to the ground]] [[EverybodysDeadDave and presumably killing pretty much everyone in it.]] Oh, [[FightingYourFriend and they blackmail your partner and one of your closest friends]] into it, because if he didn't, [[SadisticChoice they would've done the same to his colony.]]
* {{Narm}} - Fragile's death scream in For Answer is full of this.
** In Armored Core 2, the briefer for Emeraude [[VerbalTic rreally likes trrilling his R's for some rreason.]] It's [[WhatTheHellIsThatAccent harrd to tell what kind of accent he's trrying to prresent,]] which also makes it harrd to take him serriously sometimes.
* PlayTheGameSkipTheStory: The only way to understand any story in this series is through the messages that are sent to you when you complete certain missions. Too bad that you'll be busy bypassing this part in favor of setting up your AC for the next arena fight or mission. It doesn't help that the story in the series is [[SoOkayItsAverage somewhat mediocre]], and when the story ''does'' get good, From Software decides to {{Retcon}} it in favor of another game. Adding insult to injury, two of the games don't even have a story at all.
* RecycledScript: For a while the background plot to the games was getting more creative, but at point they just started to recycle the same plot from the first game over and over for every single game.
** [[spoiler: As of Verdict Day, this is actually a ''plot point''. Turns out that V and Verdict Day are the same universe as 4 and For Answer, and humanity keeps blowing itself up ala Turn-A-Gundam.]]
* ScrappyMechanic - Overheating in ''Nexus''. [[OlderThanTheyThink While the mechanic was introduced in Armored Core 2]], it was totally irrelevant to the point that you could get by with the [[LethalJokeItem starter radiator]] for almost every mission, with the only drawback being a [[WeaksauceWeakness vulnerability to heat-based weapons]] which only a few Ravens even use. It's only in ''Nexus'' that it became a problem, as you not only need a high-quality radiator, but you also need parts with high cooling or low heat so your mech doesn't fry itself.
* ScrewedByTheNetwork: On the English front of AC V which has two different servers for the game being US and EU, this is bad because the series doesn't sell as well as it does in Japan and the player base is starting to drop due to the game being three patches behind the Japanese version of the game, having multiple [[GameBreaker game breaker's]] and having UnstableEquilibrium kick in.
* SpecialEffectFailure / SciFiWritersHaveNoSenseOfScale - Either your NEXT sponteneously turns into a Behemoth during ''For Answer's'' Cradle missions, or those 20 million people on board are very, very small indeed.
** It could be handwaved by having their living quarters inside the portions you are supposed to attack. But even then, I highly doubt that those areas are big enough to house 10 million people total.
** When you lose an online match in 5 you bail out of your AC and fly around with a jump pack which is fine, but you're so much bigger than the cars that sit idle on the maps. Even worse is that when you touch them they explode.
*** At least From knows this since they added some silly models for them like a ninja holding onto a raven ([[NinjaBlade Ken?]]) and a mini Nineball Seraph.
* SuspiciouslySimilarSong: "12 Steps", the garage theme in ACV, has a more than passing rssemblance to "Teardrop" by Music/MassiveAttack.
* ThatOneBoss -
** Let's see...Stinger from Project Phantasma, The Frighteners from [=AC2=], the Massive MT and the {{Bonus Boss}}es from Another Age, Leviathan and Ofanim from [=AC3=], Big White and IBIS from Silent Line, Agraya, Genobee and [[spoiler:Nine Ball]] from Nexus, Nine Ball from Ninebreaker, Nine Ball from ''any game he appears in'', Zinaida (On the Last Raven path) and the Pulverizers from Last Raven, take your freaking pick.
** For some players, ANY AC of relatively equal quality is ThatOneBoss.
** Sherring in AC 4 isn't exactly a pushover, either.
** Nineball. Seraph. Yeah it's the FinalBoss, but it qualifies due being a huge DifficultySpike above anything you fought before (your armor is actually restored before the fight with it unlike everything fight in the game, that's how hard the developers realized it was). No matter how you built your AC, this thing's machine gun arms and laser blades can literally kill you in seconds, and it's hard to avoid its missiles as well. Compounded by the lack of cover and your inability to match his speed and flight ability. There's no real strategy for beating it, all you can do is shoot at it and try your best to avoid getting killed. [[spoiler: Much less so in AnotherCenturysEpisode R, however.]]
** [[spoiler: Chief 'piloting' Exusia]] in 5 who is fast enough to easly kill the standard AC build in a few passes if you give him room to breath.
** [[spoiler: White Glint]] in Verdict Day. Missiles? Check. Fast and dodges a lot? Check. [[spoiler: Primal Armor field so you can't hit him? Check. Assault Armor and a massive explosion? Check. A 2nd phase that you take damage wherever you go and it starts to dodge even more?! Check.]] And if that wasn't enough a bonus version of it exist somewhere and it's anyone's guess how hard it is.
** How bad is the Bonus version? It now starts using it's [[spoiler: VOB]] so it's even faster has a laser attached and divebombs the area.
* ThatOneLevel -
** Missions set in fog will sink your mission rating due to the time it takes to complete them.
** Same with the above that one boss entry with any AC/NEXT being one the same goes for missions.
** Occupation of Arteria Carpals. (It's ThatOneBoss x4 or 5)\\
Well, you deserve it, you bastard.
** Arms Fort Answerer too, unless you know what you are doing.
** White Glint the first few times you fight the bastard. Every time after that? Cakewalk.
** [[MightyGlacier AF Cabracan]]. Not because of the difficulty (it's a piece of cake), but the [[GoddamnBats Land Mines and the Drones]]. It takes most of your ammo to take half of them out if you are using any guns, and you can forget about explosives because of their mobility. Oh, and they can walk through walls, apparently treating the sand you stand on as though it weren't even there, and making it impossible to hit them until they resurface. [[GoodBadBugs They are not designed]] [[TheComputerIsACheatingBastard with that ability in mind.]] They are also fairly nimble and airborne, making swords very difficult to use.
** Sol Dios Orbit in For Answer... unless you're playing on hard mode.
** Any mission in ''Verdict Day'' that involve [[GoddamnBats Autonomous arms]]. Unless you have scanned all the arms before hand and prepared for such, you will have an arm that is resistant to your weaponry.
* VisualEffectsOfAwesome - As far as this [[http://www.youtube.com/watch?v=09L_WZQr9Nc&feature=related trailer]] is concerned, the PolygonCeiling doesn't exist.
* WinBackTheCrowd: Verdict Day for the western fanbase as it has a better setup online, a merged US/EU server, better part selection, increased energy output across the board, Hardcore mode, [[spoiler: White Glint and combining V/VD and the 4/4A continuities together.]] Only time will tell if it holds up.
** Also applies to every expansion as it adds more to each engine, 4 to For Answer is a good example.