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Protagonists (Broken down by game appearance)
Marco (Marchrius Dennis Rossi)
Marco joined the military's vocational school following technical high school, and after graduating, joined the Peregrine Falcons Squadron, soon becoming its leader. Though generally a good-natured guy, he tends to flip his shit whenever Morden is mentioned, given the fact that Morden was responsible for the deaths of many of his good friends.Off the battlefield, Marco is an expert computer technician, often creating computer viruses for fun, but one in particular that unintentionally made its way onto the net infected the military's mainframe, made it past all of the firewalls and almost caused the launch of several nuclear missiles. He intends to take that secret to his grave.From Metal Slug 6 onward, Marco's unique ability is to deal double damage with his handgun. If playing on Easy, though, this ability transfers over to the automatic Heavy Machine Gun. In Metal Slug 7/XX, he can also use the Burst Shot, which allows for rapid fire, though he can't move.
Marco Rossi's Tropes:
- All-American Face: More or less designed as the typical American war movie hero.
- Berserk Button : Anything involving General Morden.
- Boring, but Practical: His ability in the later games is dealing double damage with a handgun. While this is hardly flashy, it's invaluable whenever you're without any upgrades. In Defense, his special is to shoot his Heavy Machine Gun, which is hardly flashy but a good all-purpose skill.
- Eagle Land: He's a tanned, blonde-haired American who loves big guns and justice.
- Emergency Weapon: Starting in 6, he is focused on making the starting peashooter of a handgun not so pathetic. By dealing double damage, it's actually pretty decent. Another weapon is still preferable, but not as much.
- Extendo Boxing Glove: An alternate melee attack for when he's crouching.
- Handguns : His attack power is doubled while firing a handgun.
- The Hero: The leader of the team and the poster boy of the series.
- Heterosexual Life-Partners: With Tarma, who has been with him since the very beginning.
- "Open!" Says Me: An alternate melee attack when he opens chests is to simply kick them open.
- Playful Hacker : During his spare time. He accidentally almost launched nuclear weapons at one point.
- The Smart Guy: Outside the battlefield he's an expert hacker.
- Truly Single Parent: He's the "father" of MS-ALICE.
- Vitriolic Best Buds : With Tarma
- Weapon of Choice: The Heavy Machine Gun, but initially it was the standard Pistol.
Tarma (Tarmicle Roving III)
Son of a military man, he entered the Special Forces Training School after finishing junior high. At age 20, he joined the Peregrine Falcons on a mission to rescue the president, at which point he met Marco, the two becoming fast friends. When he found out Marco had been selected to take part in the counteroffensive against Morden, Tarma was quick to volunteer. Though he often pokes fun at Marco, he holds his friend in the highest regard.Whenever he's not engaged in battle, he builds custom motorcycles with such attention to detail that he puts most professionals to shame. If and when he can retire from active service, he intends to open his own motorbike shop.Tarma's engineering skill from Metal Slug 6 onward allows him to make better use of the Slugs that he comes across. They can take twice as many hits, he can use the vulcan fix, the vulcan's damage is increased, and he obtains twice as many Slug Shells on pickup. In 7/XX, he can also kick Slugs, which can either recover or damage them. However, the double durability and recovery/damage kick only works on Vehicle Slugs.
Tarma Roving Tropes:
- Ace Pilot: His specialty on the team starting in 6. He's the best at handling vehicles and it translates to gameplay as tougher vehicles, stronger weapons in them, and new abilities.
- Badass Biker: Off-screen. The Cool Shades and his backstory of expertly building bikes establish him as this.
- Cool Shades: Never seen without his shades. It also helps distinguish him from Marco at a glance.
- Demoted to Extra: Becomes a supporting character in 4, but regains his playable status in 5.
- Gadgeteer Genius : He's the team's Slug expert, largely due to him tinkering with vehicles in his spare time.
- Glass Cannon: In Defense, he has the lowest HP of the four main characters but his Shotgun does the most damage.
- Heterosexual Life-Partners: He's the only character who has been with Marco from the beginning.
- Meaningful Name: As the Metal Slug technician of the team, his name last name is Roving.
- The Lancer: Marco's best friend and foil, as well as the default player 2.
- Percussive Maintenance : His Slug Kick. Sometimes averted, causing damage to the Slug instead.
- Vitriolic Best Buds : With Marco.
- Weapon of Choice: The Shotgun.
Metal Slug 2
Eri was found abandoned on the steps of a church. When she became wise to the ways of the world, she eventually ran off and became the leader of a gang of street kids. The Intelligence Department of the Regular Army noticed her leadership skills, and thus recruited her. She went on to receive spy training, and took part in a number of missions requiring assassination. She found these types of missions distasteful, and requested a transfer to the SPARROWS division. Given her impressive track record, it was approved. Once transferred to the SPARROWS division, she was assigned the role of team demolitions expert.Given Eri's background of growing up among street children, her demeanor and attitude in life mostly boils down to "Rely on nobody but yourself."Eri's unique talent from Slug 6 onward is handling grenades. She starts each life with 20, gains double grenades on pickup, deals more damage with them, and is the only one able to aim her throws, which includes straight upward.
Eri Kasamoto Tropes:
- Action Girl: Kicks as much ass as any of the men.
- Bare Your Midriff: Setting a trend, her military "uniform" exposes her belly.
- Brutal Honesty: In her first mission with Fio, Eri was blunt saying that her inexperience in combat was going to get them both killed, and that Fio was better hanging back so Eri could go on alone.
- The Big Girl: While the whole team packs plenty of power, she's the explosives specialist.
- Compressed Hair: Hidden in her bandana in her sprites. Some pieces of official art would have some of her hair spew out of her back head.
- Dark and Troubled Past: We need to reiterate that her old career as an espionage agency assassin was somehow so "distasteful" that she compared it unfavorably to blowing people up with grenades and flamethrowers.
- Demoted to Extra: Becomes a supporting character in 4, but regains her playable status in 5.
- Heterosexual Life-Partners: With Fio.
- Informed Loner: She's on a four person team by the time of her introduction and does little to show off her loner personality. Made more apparent in Attack, where one of her strongest memories is abandoning Fio on her first few missions because she was too slow.
- In-Series Nickname: "Memphis Bomb Princess".
- Japanese Delinquents: A variation. Eri was a former sukeban (female gang leader) and she still sports blond hair.
- Mukokuseki: While she does have (light) brown eyes, her hair's a shade of blond that is anything but Asian, let alone Japanese (she's from Hiroshima). It is unknown if her blond hair was a leftover of her childhood as a sukeban.
- Sdrawkcab Name: Spelling her name backwards in Hiragana will get the name of a famous Japanese pop star Rie Tomosaka.
- Stuff Blowing Up: Starting in 6 her specialty is grenades.
- Tomboy and Girly Girl: Eri's the Tomboy. Her backstory, attitude, and appearance are much tougher than Fio's.
- Weapon of Choice: The laser.
- Younger Than They Look: Eri's two years younger than Fio, considering Eri's tougher personality.
Fiolina "Fio" Germi
Daughter of the massively wealthy Germi Family, hailing from Italy. The Germi family has historically been a military family, sending their oldest into service, so naturally her father wished for a healthy son to carry on the name. However, following Fio's difficult childbirth, her mother was unable to bear anymore children, making it the first time the Germi heir was female.Eri's polar opposite, Fio was raised in a loving family, and has a cheerful and upbeat demeanor. Aside from her soldier training, she also studied chiropractics, acupuncture and moxibustion in university, and hopes to become a sports doctor in the future.Fio's special trait from the sixth game onward is carrying extra ammo for her weapons. She starts each life with a Heavy Machine Gun, and gains 50% more ammo on weapon pickup. If playing on Easy, though, she automatically gets the Big Heavy Machine Gun as her initial armament.
Fio Germi Tropes:
- Action Girl: No less a capable fighter than any of the men.
- Badass Adorable: Best exemplified by her victory animation of her falling down coquettishly. Mind you, this is after wiping out hundreds of enemy troops.
- Bare Your Midriff: As is the norm with female fighters in the Metal Slug universe.
- The Chick: The medical expert of the team and also the most emotional.
- Finger Poke of Doom: Her melee attacks include swift tonfa strikes, hatchet slices, and sissified slapping and shoving. Enemy soldiers die horribly all the same.
- Girly Bruiser
- Guest Fighter: She is playable in The King of Fighters: Maximum Impact 2.
- Heterosexual Life-Partners: With Eri.
- Heroic Self-Deprecation: She usually thinks less of herself in comparison to her teammates.
- Meganekko: An archetypical example in video games. She's got the cute look, modest personality, and is overall moe because of it.
- Miss Fanservice: A lesser one compared to Sofia, but far better known among fans. Cute girl with with a nice figure (which is obvious on any piece of official art, especially next to the modestly endowed Eri).
- More Dakka: Her Specialty from Metal Slug 6 onwards. The Heavy Machine Gun is basically her default weapon.
- Older Than They Look: Despite her appearance and character, Fio is two years older than Eri.
- Small Girl, Big Gun: The heavy weapons specialist is the smallest of the four main playable characters.
- Stay in the Kitchen: Fio'a father would rather she not be in combat so damn much. Whether it's because she's a woman or because she's an only child (and thus putting the whole family line in danger since she has no children of her own) is up for debate (possibly both).
- Took a Level in Badass: She's normally the meekest of the main cast, but at the end of Metal Slug 3, she stands in a very proud manner atop of a floating Metal Slug. Eri, in comparison, has a hunched demeanor.
- Tomboy and Girly Girl: Fio's the Girly Girl compared to Eri's Tomboy. She's got a sheltered background, cuter looks, and is much less hardened in general.
- Weapon of Choice: The Rocket Launcher, but initially it was the Heavy Machine Gun.
Metal Slug 4
Initially, Nadia wanted to go into the modeling business, but she couldn't stop eating, which meant she kept gaining weight, so she enlisted into the Regular Army for the exercise. Here, she discovered her skills as a soldier, and was chosen to help in stopping the Amadeus Syndicate from releasing its supervirus. Here, Nadia was a stand-in for Eri, who had been assigned to other duties. The one thing putting her apart from Eri is that her alternate melee weapon is a souped-up taser, capable of shredding the enemy. Unfortunately, due to some in-game bugs, she doesn't get as many points for using her melee.
Nadia Cassel Tropes:
- Action Girl: Runs and guns with the best of them.
- Bare Your Midriff: Not that it isn't a standard with the Regular Army in general.
- Big Eater: Compared to the other characters whose powerup relies in eating, she takes it Up to Eleven. Her idle animation almost always leads her grabbing a bite on a chocolate bar.
- Formerly Fat: Well, except the ending has her eating a big feast alongside the other heroes.
- Gainaxing: Whenever she does her close-range attack in her Valentine's Day outfit.
- Girly Bruiser: Especially her Valentine's Day outfit in Defense and Attack. This doesn't stop her from kicking ass, though.
- Girlish Pigtails: As evidenced by the fact she joined the military not to prove herself, defeat evil, or a love of fighting, she's just a girly girl who joined for girlish reasons. Her hair is appropriately in pigtails.
- Mundane Utility: Joining the military in the midst of conflict seemed like an easier way to lose weight than eating less.
- Rose-Haired Sweetie: She's definitely the cutie and probably the least militaristic of the protagonists, fitting her pink hair.
- Spy Catsuit: "Special Nadia's" outfit.
- Signed Up for the Dental: Joined the military as a way to exercise and lose weight.
- Significant Green-Eyed Redhead: Rose-Haired Sweetie with green eyes in her portrait.
- Stun Guns: She uses a taser as her melee attack.
- Set Swords to "Stun": Inverted. Her taser is set to essentially killing her victims outright like the rest of the team's melee attacks.
- Suspiciously Similar Substitute : To Eri, in terms of animations.
- Weight Woe: The reason she joined the military is to lose weight, going up her needs to become a supermodel. Unfortunately this gets conflicted to the fact when she's admitted to be a known Big Eater.
Trevor received his first computer at age three. By the time he was seven, not only could he perform complex coding, he also worked on creating antivirus progams during summer break, many of which are still in use at the school he attended. When he ended up joining the Peregrine Falcons, he found a great deal of respect for Marco, whose own computer skills surpassed his own. Here, he acted as Tarma's stand-in. His melee involves kicking the enemy so hard, it shreds them apart; he gains double points for this, but he has to hold still.
Trevor Spacey Tropes:
- Armed Legs: His melee is a powerful kick called Knife Boots.
- Asian and Nerdy: Korean and a Playful Hacker.
- Bishōnen: Compared to the other male characters, he's young and boyishly handsome.
- Child Prodigy: Literally owns and uses a computer since he was three years old.
- The Cracker: Zigzagged with Playful Hacker. Becomes the Regular Army's support hacker and a sideline commando.
- Nonstandard Character Design: Sprites-wise, Trevor is the only male who normally has sclera around the pupil (most have Black Bead Eyes).
- Oblivious to Love: More like he doesn't know that Abigail blushes at the sight of him.
- Playful Hacker: A point which causes him to get along with Marco, another playful hacker.
- The Smart Guy: An ingenious hacker.
- Suspiciously Similar Substitute : To Tarma, who was not playable in his game.
- Weapon of Choice: The Two Machine Guns.
Metal Slug Advance
Walter joined the Peregrine Falcons squad with the hopes to train his mind and body, knowing he had the stamina to keep up with the rest of them. However, he never would've guessed his initial "training" would turn out to be a rescue mission.
- Falling into the Cockpit: An early training mission became a very real mission as his drill instructor turned out to be The Mole.
- Mama's Boy: His hobby is listed as "phoning his mama."
- Palette Swap: To Marco.
- Suspiciously Similar Substitute: Again, to Marco as the main "guy" character.
- You Gotta Have Blue Hair: His hair is literally blue. No mention is made of this.
- Weapon of Choice: The Drop Shot.
Tyra's strong desire to fight evil is what motivated her to join the Peregrine Falcons alongside Walter. After getting the highest score on the written test, she was immediately put to the physical training course on the island where the game takes place.
- Bare Your Midriff: Not normal combat attire, even for a trainee.
- Falling into the Cockpit: An early training mission became a very real mission as her drill instructor turned out to be The Mole.
- Palette Swap: She uses an edited version of Nadia's sprites.
- Revolvers Are Just Better: Defaults to a revolver, as shown in her official art.
- The Smurfette Principle: The only female to be a member of the PF Squad. Every other female is on the SPARROW Squadron.
- Suspiciously Similar Substitute: Has the same outfit as Nadia, her hair is also a red hue, and introduced as a new female character along side a new male character.
- Weapon of Choice: The Super Grenade Launcher.
Ikari WarriorsRalf and Clark, in between their appearances in The King of Fighters series, appeared alongside the core team for Metal Slug 6, and are back for Metal Slug 7/XX. Joining them in XX is Leona and later Whip and Heidern in Metal Slug Defense. A better amount of information about these five can be found on their respective series' page.
Aside from his participation in various fighting tournaments, little to nothing else is known about him or Clark. There's rumors flying around, but he tends to ignore them.Though carrying half as much ammo and grenades as anyone else, Ralf makes up for this with his Vulcan Punch, capable of destroying tanks, and his melee speed is much faster than anyone else's (and his normal melee can also damage things that others cannot). He's also the only character capable of taking two hits. He's just that tough.
- Dash Attack: His other special move, the Galactic Phantom Punch.
- Heterosexual Life-Partners: With Clark.
- Hot-Blooded: The guy is willing to charge a tank with his bare hands.
- Knife Nut: Collects knives as a hobby. Though ironically he's one of the few that doesn't use them on the battlefield.
- Lightning Bruiser: He can run and jump as well as everyone else, has fast (and highly damaging) melee attacks, and takes 2 hits to kill, unlike most of his allies.
- Made of Iron: Why can he take a tank shell? Just because he's that damn tough.
- One-Hit-Point Wonder: Averted; he can take two hits.
- Rapid-Fire Fisticuffs: His special move, the Vulcan Punch.
- Red Oni, Blue Oni: The red to Clark's blue.
- Weapon of Choice: The Flame Shot.
Clark and Ralf have been longtime friends, even in the unit the two of them are assigned to.Clark's unique ability is his Super Argentine Backbreaker, a special melee move capable of earning him a lot of points in a short time frame. He also gains a small window of invulnerability with each enemy he tosses with this. However, it only works on certain human-sized enemies.
- Cool Shades: Much like Tarma. Echoing Tarma's relationship with Marco, the shades serve to differentiate Clark and Ralf.
- Difficult, but Awesome: If you can overcome its short range, the Super Argentine Backbraker will rip nearly any hoarde of (human) mooks a new one.
- Hammer Space: In Defense, his special move is to pull out a large Exploding Barrel and hurl it. In Attack, his "Jet Clark" variant throws refrigerators.
- Heterosexual Life-Partners: With Ralf. They've been together for years in several combat theaters.
- Red Oni, Blue Oni: The blue to Ralf's red. He's less hot blooded and more stoic.
- The Stoic: Even when suplexing enemy soldiers, he's not exactly a Screaming Warrior.
- Stone Wall: As Jet Clark, his ability to throw refrigerators to use as blockades make him very hard to wear down.
- Wrestler in All of Us: His Backbreaker.
- Weapon of Choice: The Iron Lizard.
Leona was adopted by Commander Heidern following her involuntary transformation and slaughter of her hometown, and Clark and Ralf helped to oversee her training.Leona joins the team for XX, but has to be unlocked via DLC (she's only 99 cents, well worth it). She carries an amalgamation of everyone else's skills (Stronger pistol fire, 20% more ammo and grenades, Slugs can take an extra hit, and she retains her weapons after losing a life. Interestingly, her special melee, Moon Slasher, can destroy bullets). According to her profile, Clark, Fio and Leona finished a mission that also further bonded the three as being good friends.
Leona Heidern's tropes:
- All Your Powers Combined: In XX, she has basically everyone else's special skills.
- Ascended Extra: Originally appeared in a cheap cell phone game before being moved to the main series.
- Cat Girl: By donning cat ears, she can decrease her hit points while increasing her attack.
- Close-Range Combatant: In Defense, her moon slasher is her only move.
- Guest Fighter: She originates from the King of Fighters series.
- Signature Move: Her Moon Slasher
- True Companions: With Ralf and Clark, ever since KOF '96.
Whip makes her debut in Metal Slug Defense as part of the King of Fighters faction. Since the KOF faction does not exist in Metal Slug Attack, Whip has been moved to the P.F. faction.
- Cast Herd: Whip was separated from Ralf, Clark, and Leona in Defense, since the latter three are part of the P.F. faction. While she eventually joined alongside them in the same faction in Attack, Whip is not part of the Wrath team, rather being placed next to the Slugnoid Type-B for the Agent Sally team.
- Last Episode, New Character: Whip and Heidern were the final units implemented in Metal Slug Defense.
- Revolvers Are Just Better: Her special attack is shooting a bullet from a golden revolver. Its range is short in Defense and much farther in Attack.
- Whip It Good: Her standard attack. Her whip is able to cause knockback in Attack.
Heidern makes his debut in Metal Slug Defense as part of the King of Fighters faction. Since the KOF faction does not exist in Metal Slug Attack, Heidern has been moved to the P.F. faction.
- Cast Herd: Heidern was separated from Ralf, Clark, and Leona in Defense, since the latter three are part of the P.F. faction. While he eventually joined alongside them in the same faction in Attack, Heidern is not part of the Wrath team, rather being placed next to the Donkey Slug (Eri) for the "Operation Ikari" team.
- Early-Bird Cameo: Appeared as a drill instructor in Defense's Combat School before becoming a playable unit.
- Hired Guns: The leader of the Ikari Warriors, who sends his troops to the Regular Army whenever there's a big conflict.
- Last Episode, New Character: Whip and Heidern were the final units implemented in Metal Slug Defense.
- Life Drain: His special attack has him jump and suck the life of the closest unit.
- Precision F-Strike: Go. To. HELL!
- Razor Wind: His long-range attack.
Antagonists (By faction)
- Debut: Metal Slug
- Big Bad: For most games, though sometimes he gets the title hijacked.
- Butt-Monkey: Appearing on screen is usually a sign that he'll suffer a Humiliation Conga.
- Cool Plane: Despite being an army general, he seems to have a strong preference to copters and planes over tanks. The few times he is in a tank, its a method of defense, not hiding.
- Evil Laugh: Tends to laugh in a mocking tone upon approaching the player.
- Eviler Than Thou: Frequently on the receiving end of this.
- Eyepatch of Power: The man certainly looks imposing thanks to his eyepatch.
- Final Boss: Of the original and of 7/XX.
- Joker Immunity: Despite being defeated and/or double crossed whenever he appears, he always survives to lead his army again.
- Made of Iron: When riding in the Hi-Do in the first game, he can take even more bullets than Allen O'Neal.
- Made of Plasticine: Applies to his troops.
- Not Me This Time: Against all expectations, he is not the main villain of 4. The Amadeus syndicate actually abuses this expectation, having robot copies of both Morden and Allen.
- Too Dumb to Live: He allied with the Mars People a second time in 3 despite them betraying him in the last game. It goes as well as you'd expect.
- Well-Intentioned Extremist: Distraught over the death of his son in a terrorist attack that could have been prevented and angered at corruption in the Regular Army, he abandoned the Regular Army and formed his own terrorist group, the Rebel Army, and while he plans on removing corruption from the world, his ultimate goal is to create a world wide military dictatorship.
- Debut: Metal Slug
Allen O'Neal tropes:
- A Day In The Lime Light: He's the player character for the (Japan Only) Metal Slug: Allen's Battle Chronicles game and its enhanced American port, Metal Slug Mobile 3.
- Annoying Laugh: When he's not taunting the player, he usually can be heard going "YAHAHAHAHAHA! YAHAHAHAHAHA!"
- BFG: Wields a large machine gun whenever he's fought.
- Boss Banter:
- "C'MON, BOY!"
- "YOU'RE MINCEMEAT!"
- The Dragon: To Morden. Also doubles as The Brute.
- Duel Boss: He almost always provides the player with a Heavy Machine Gun before his fight, to be a match against his own. in 7 he wield a Slug Gigant, which is matched by the player's own Gigant (though the fact that the two use the same weapon is happenstance in this case). The one time he uses a clearly advantagous weapon without giving the player something to compensate, It turns out to be a duplicate.
- Engrish: "GO HOME TO MOMMY!"
- Joker Immunity: Like Morden, he always keeps coming back, despite having been riddled with bullets and falling to his death in the first game, the second having him fall down to the ice water but apparently getting eaten by a giant Orca. The third game doesn't have anything notable besides him collapsing and falling about twenty feet, but his body still vanishes like regular enemies do after the fight. In Attack he gets impaled by Caroline's Augensterm and electrocuted in an Extra Ops story.
- Lightning Bruiser: Despite being bigger than the playable characters, he's also faster than them.
- Implacable Man: He cannot be stopped. Just shooting him alone is barely going to phase him.
- Improbable Weapon User: Get too close to him and he'll slap you with the ammo belt of his machine gun.
- Large Ham: He's the only character in the Metal Slug franchise to actually have spoken lines. And they are ALL taunts!
- Made of Iron: He's a human (except in 4), just like the player characters. Unlike the player characters, he has an obscene amount of health for a human, being able to last longer than a tank!
- See You in Hell: His death cry.
- Turns Red: His skin turns red as he takes more damage and speeds up.
- Unexplained Recovery: All the time. Bonus points for Metal Slug 3 having him return during the attack on the Mars Peoples' Mothership despite you apparently killing him in the same level.
- Debut: Metal Slug 2/X
- Bad Boss: He has a terrible habit of refusing to own up to his own mistakes. In Attack he refuses to let his own troops stop to refuel their units, then blames them for running out of fuel at a critical moment.
- Dummied Out: Sprites of Abul attacking and setting up his white flag are present in 2's ROM. These get their use in Defense and Attack.
- Hoist by His Own Petard:
- I Shall Taunt You: Shows up multiple times commanding his troops and taunting the player.
- Know When To Fold Them: Waves a white flag once things go bad for him.
- Starter Villain: He serves as a first-level foe whose army is even worse equipped than the Rebels, and his troops lose all presence after the first level.
- The Unfought: The player ends up fighting the mission's boss while ignoring Abul in the background.
- Debut: Metal Slug 7/XX
- Debut: Metal Slug Advance
Allen Junior's Tropes
- In the Blood: He tries to act smarter than his father, and indeed becomes more successful in attacking the Regular Army than him, but in the end gives in to the same rage his father is known for.
- The Mole: He infiltrated the Regular Forces training camp by posing as a drill instructor.
- Pistol-Whipping: One difference from his father is that he does not typically use a knife, instead preferring to slam his opponent with his ammo belt, which is one of the few non-lethal attacks in the game.
- Debut: Metal Slug 2/X
Mars People Tropes:
- Aliens Are Bastards: They just want to conquer and destroy without much backstory.
- Alien Blood: They bleed green.
- Chronic Backstabbing Disorder: They betray Morden twice, for no reason other than because they can.
- Everything's Squishier with Cephalopods: Resemble giant squid or octopi.
- Expy: They look exactly like H. G. Wells' martians.
- Flying Saucer: Their main vehicle. Their mothership is an even bigger one.
- Giant Space Flea from Nowhere: In Metal Slug 2. Not so much in X, where they are foreshadowed better.
- Hoist by His Own Petard: Both their betrayals of Morden and the Rebel Army lead to an Enemy Mine that causes their defeat. The first time because a pilot from the Rebel Armor rams their mothership and forces it to retreat, the second because the Rebel Army provides the player character with a rocket that allows them to reach their mothership.
- Last Episode, New Character: They show up in the last level of 2. Averted in X where they appear in earlier levels.
- Ray Gun: They wield these, just like classic aliens... although said guns tend to fire out slow, homing, destructible nucleus-like projectiles.
- Starfish Aliens: They resemble giant jellyfish/squid. Yet they have skulls, green blood, and mouths.
- Debut: Metal Slug 3
- Big Bad: Of 3.
- Eldritch Abomination: He may look like E.T., but he does it Lovecraft-style.
- Final Boss: Of 3.
- Free-Fall Fight: You fight him while you and the soldier you rescued (and another player, if any) fall down to Earth.
- Good Scars, Evil Scars: He has a number of Frankenstein-like stitchings on him.
- Greater-Scope Villain: He's the one who masterminded the alien invasion in 2/X but was not seen in the game. You do fight his mothership, however.
- Large and in Charge: The normal Mars People are human-sized, he takes up most of the screen you fight him on.
- My Brain Is Big: Bonus points for it actually being visible, encased in a dome.
- Psychic Powers: Fitting for an alien with a giant brain, it has psychic powers.
- Super Intelligence: Part of the reason he's the leader of the Mars People.
- Debut: Metal Slug 5
- Expy: Of the Rebel Army. Most of the enemies are even edits of Rebel soldier sprites. They're also one to the Brotherhood of Nod.
- Knight of Cerebus: While Metal Slug 5 has most of the series usual silliness, the Ptolmaic Army's typical soldiers lack the silliness of the Rebel Army.
- Power Copying: They specialize in stealing technical plans from the Regular and Rebel Army.
- Religion of Evil: They are led by Ptolmaic Shamans, and apparently worship Evil Spirit Incarnate.
Evil Spirit Incarnate
- Debut: Metal Slug 5
- Attack of the 50-Foot Whatever: Aside from the Mars Peoples' mothership (which is big enough to serve as an entire stage), it's easily the largest boss in the series, which is no small feat by any means.
- Autobots, Rock Out!: The battle against the Evil Spirit Incarnate has a heavy metal remix of the "Final Attack" theme.
- Background Boss: Spends most of the fight in the background, and you have to shoot the glowing skull on its chest.
- Big Bad: Is presumably this for 5, but we may never know.
- Dramatic Thunder: Thunder and lightning strikes when the boss makes its appearance.
- Eldritch Abomination: A gigantic demonic creature that looks like it was made from the fabric of space itself. It also has a skull in it's chest that serves as it's weak point.
- Generic Doomsday Villain: Even by the standards of this series.
- Giant Space Flea from Nowhere: Seriously? Where the hell did this thing come from? There's no explanation if it was allied with the Ptolemaic Army, or if it was their leader, or if they were a Religion of Evil and its their God of Evil they were summoning to bring about The End of the World as We Know It.
- Knight of Cerebus: Whatever this thing is, its design is very much Darker and Edgier compared the usual bosses that appear in the series and is actually very menacing.
- Playing with Fire: Most of its attacks will burn you to death should they kill you.
- Screw This, I'm Outta Here!: It doesn't die when defeated, it just flies away into the background.
- Sinister Scythe: Which appears to be forged out of flames.
- Debut: Metal Slug Attack
- Big Bad: Since the Evil Spirit Incarnate hasn't made an appearance in either tower defense game, Ptolemaios takes its place.
- The Cameo: Mostly unintentional, but his towers (as well as the Stone Turtle and the Elephants) can be seen in the background of Mission 5.
- Death from Above: Drops rosetta stones on top of the opposing team.
- Dummied Out: A nearly complete set of sprites is present in Metal Slug 5. Most of them are given use in Attack.
- Evil Old Folks
- Shadow Dictator: How his description in Attack handwaves his lack of appearance in 5.
- Shock and Awe: The bottom of his tower produces lightning strikes.
- Debut: Metal Slug 6
- Aliens Are Bastards: Even moreso than the Mars People.
- Evil Is Visceral: They have an organic lair as opposed to the Mars Peoples' technological one.
- Food Chain of Evil: Think the Mars People were deadly? These guys literally eat Mars People for breakfast.
- Giant Enemy Crab: The Crab-tanks and Vanguards.
- Knight of Cerebus: The Mars People have an Oh, Crap! reaction when they show up and eat them at the end of Mission 2. The final mission also has a Dark Reprise of the classic "Final Attack" theme.
- Heli-Critter: The Smashers, which spin their legs to fly in the air like a helicopter before inflating themselves to crash down on you.
- Unique Enemy: There's a Gold Hunter Walker encountered if you take a secret path in the final mission, killing it grants 50000 points.
- Spin Attack: The lowest ranking mooks move around via spindashing.
- Zerg Rush: The standard troops ambush in groups. In Mission 3, a large horde of them come spinning down from the right side.
- Debut: Metal Slug 6
- Background Boss: Most of the boss is in the background- you need to attack her head to damage her.
- Big Bad: The leader of the Invaders in 6.
- Disney Villain Death: Falls to her death before explodes in a massive explosion.
- Eye Beams: Purple ones that aim at you.
- Final Boss: Of 6.
- Flechette Storm: Has an attack where she charges energy then releases it in crescent projectiles. Then they fly at the player from the left and right, or may even converge on them from all directions.
- Hold the Line: The final part of the battle turns into a Free-Fall Fight where she's invulnerable, sending huge waves of destructible projectiles dowanwards at you.
- Large and in Charge: She's one of the biggest Invaders there.
- Trick Boss: You face off the pod she's encased in. It stays there, doesn't do anything, and is periodically accompanied by Venusians. When beaten, a bunch of Morden soldiers come in to celebrate with a victory music of sorts... and then her eyes light up and destroy the soldiers. Time for the real boss.
- Debut: Metal Slug 4
- The Cracker: The Amadeus Syndicate are a team of cyber-terrorists.
- Elite Mooks: The disguised Amadeus troops use Heavy Machine Guns in the final level.
- Everyone Calls Him "Barkeep": Amadeus is referred to as "Doctor" in Metal Slug Attack.
- Evil Old Folks: Amadeus himself
- Framing the Guilty Party: Their soldiers dress up as Morden's troops, and they have robot Mordens and Allens, presumably to invoke this trope. In the last level, they instead dress up as Regular Army troops.
- Mecha-Mooks: Employ a lot of these.
- Palette Swap: In Attack, the Infantry are purple colored Rebel Soldiers.
- Robot Me: Robot Mordens and Allen O'Neils.
- Synthetic Plague: They managed to harness the Mummy and Zombie viruses from the previous games.
- Villain Team-Up: With the Rebel Army in Attack. When Allen and Abigail were being ambushed by the robots, they assumed the Syndicate betrayed them. They were not; it was the Syndicate's supervirus doing all the dirty work for her own.
- Debut: Metal Slug 3D
- Abusive Precursors: Oguma and his people essentially began life on Earth, but they have no problem snuffing it out in pursuit of their goals.
- Affably Evil: Speaks in a very polite and calm voice.
Pharaoh's Arc and the Mummy Army
- Debut: Metal Slug Attack
Tropes for all three characters:
- Actually Four Mooks: Subverted. While the Pharaoh's Arc consists of multiple mummies on a chariot, they are all part of the same unit.
- Distracted by the Sexy: The Mummy Cats' main way of luring their enemies.
- Dub Name Change: The Mummy Cats are called Sexy Mummies in Japan.
- Enemy Summoner: The Mummy Cat's attack is to summon mummies that spit out poison bombs. If her third skill is unlocked, enemies hit by them have a chance to be stunned.
- Kill It with Fire: The Mummy Warrior uses a long torch as his weapon.
- Palette Swap: The Lovely Mummy is a red colored version of the Mummy Cat.
- Support Party Member: The Mummy Cat is awkward to use, but three of her four skills involve increasing the strength of Mummies, Mummy Warriors, and Mummy Dogs.
- Villainous Breakdown: The Pharaoh turns green in rage alongside his minions after being defeated. As the Tyrant Pharaoh, he starts commanding in a furious manner.
Support Characters and other notable NPC's
Rumi and Madoka Aikawa
Rumi originally joined the Regular Army to make use of their medicinal facilities to help her ailing mother, who had a weak heart, and her sister Madoka, who was physically ill. Due to a paperwork SNAFU, she was shipped to the front lines, and despite having never completed her training, she made it back unscathed, a miracle in and of itself.She was offered the chance to leave and live life as a civilian, but she declined the offer, and was soon transferred to the Supply Division. Before each mission, she fills her backpack with various supplies, and treks out to deliver the goods to Regular Army Soldiers... but there's one problem. She's horrible with directions, and is likely to wander off and be found in a completely different location, earning her the nickname "The Wandering Ghost" by most soldiers. She later found out her sister Madoka also joined to become more physically fit, and was also placed in the Supply Division... and shares the same atrocious sense of direction her sister has.Though mostly a background character in the main games, Rumi was given a bigger role in Metal Slug 3D, giving information to Marco and even allowing access to a Garage where the player could customize their own Metal Slug vehicle.
Rumi and Madoka tropes:
- Action Girl:
- Promotional art for Metal Slug Defense shows Madoka parachuting while operating a bazooka. She is not a unit in Defense but she will be in Attack, using her bazooka from her backpack and throwing a medicine item to heal units.
- Rumi turns into one in Metal Slug Attack. She throws grenades from her backpack to her foes and tosses support items to her allies. Madoka gets added later, packing a Bazooka with great range and a humongous rate of fire and healing the front line.
- Beware the Nice Ones: These two have some obscenely powerful Normal attacks in Attack.
- Butt-Monkey: A minor one, tagging either one of the sisters will cause them to fall to the floor and shooting them from the back tears their backpack open, dropping various items. The former also occurs when the player taps on Rumi on both tower defense games.
- Combat Medic: Madoka's special in Attack heals friendly troops.
- The Chick: Compared to Fio, Rumi is not willing to fight (and never wanted to do so in the first place), but Rumi is nice enough to help her fellow allies whenever she can.
- Cute Clumsy Girl: Given the above. It's taken even further in 3D when Rumi tries a dynamic entrance from a helicopter and screws it up.
- Fanservice Pack: Apparently, they've been starting to unbutton their shirts since Defense, even though their sprites in Attack show them with their shirts buttoned all the way up.
- In-Series Nickname: "The Wandering Ghost"
- It Runs in the Family: Both sisters being terrible with directions.
- The Medic: Rumi is seen in the bad ending of Metal Slug 4 taking care of the characters who got caught in the final mission's explosion. The Recovery Support in Metal Slug Attack represents her in a nurse outfit. She later turns into a Combat Medic in the 2.3.0 update. In the 2.5.0 update, Madoka is literally this, as her special attack heals the players units on the map.
- Motor Mouth: In 3D, Rumi is very talkative, cheeky, and prone to going on tangents. She even sasses Marco after he gives her direct orders (she's a corporal; he far outranks her at Major).
- Mukokuseki: Let's be honest, they look even less Japanese than Eri.
- No Sense of Direction: Though they count as P.O.W.s, they are never caught by the enemy. They just happened to wander through the area.
- Older Than They Look: Despite being a Palette Swap, Madoka is eleven years older than Rumi.
- Out of Focus: Rumi has had more game appearances and cameos than Madoka. In both tower defense games, Rumi is the one who generates AP in the field and gets playable status in Attack. In Attack only, Madoka appears in the item support menu, but now appears as a playable unit alongside her sister in the 2.5.0 update.
- Palette Swap: Madoka has brown hair and grey attire compared to Rumi's blonde hair and green attire.
- Pint-Sized Powerhouse: Both walk and carry an overly large backpack holding various ammunition and food items. Downplayed as they seem to be struggling to keep balance.
- Series Continuity Error: Metal Slug 3D has Rumi ranked as a Corporal even though she's a Sergeant in every game she appears in.
- Stun Guns: Madoka's close range attack in Attack.
- Timed Mission: If they are on screen long enough without being tagged, they will stop to salute and run away, not giving any credit to the player for rescuing them.
- Unusually Uninteresting Sight: Both sisters tend to wander the active battlefield without any care. It is not until they see one of the protagonists where they bail out of there.
- Wimp Fight: One-sided in Attack, Rumi flails her hands rapidly if anyone gets close to her; it's still enough to knock them out.
A Second Lieutenant of the Regular Army, he's a living legend among the soldiers. Pretending to be a captured POW, once he's "rescued" by the player, he helps out by firing homing Hadokens at the enemies and spin-kicking anyone else who gets too close. He will flee if you die, though.
Hyakutaro Ichimonji tropes:
- Guide Dang It!: Sometimes appears when the player hits a specific invisible spot multiple times.
- Kamehame Hadouken: His main attack has him fire a homing hadouken at enemies. It also deals pretty good damage too.
- Obfuscating Stupidity: He pretends to be a captured POW on purpose. Once he's "rescued", however...
- Screw This, I'm Outta Here!: Runs away once his rescuer dies.
- Shout-Out: His first name starts with the letter H, and his last name is Ichimonji, but he's no Hayato. Doesn't stop him from kicking ass though.
An Israeli orangutan that wears a diaper and carries an Uzi.
- Badass Normal: Compared to the main characters.
- Everything's Better with Monkeys
- Gag Penis: If you look at his Idle Animation close enough, you'll notice he pulls out 3 bananas out of his diaper and eats them, after which he tries it again but pulls out his monkey dong instead, blushes and quickly stuffs it back inside.
- Stock Animal Diet: As a monkey, he eats bananas.
Combat School Instructors
The drill instructor from Metal Slug 1 (Neo Geo CD and PSX).
- Ascended Extra: While every instructor in the series shows up in Metal Slug Defense, Sophia is the only one that hosts the Combat School in Attack (along with new sprites for her).
- Babies Ever After: Margaret, the instructor from Metal Slug X hints that Sophia retires to raise a family.
- The Bus Came Back: Shows up with Margaret in the second and third Pachislot games in Japan. In the West, it is in Metal Slug Defense.
- Ms. Fanservice: There's a good amount of art dedicated to her in the art galleries of the home versions.
- Passionate Sports Girl: What made her easily excel as a member of the Peregrine Falcons. Her favorite sport is Basketball, and also dabbles in bass fishing.
The drill instructor of Metal Slug X and Gimlet's mission control in Metal Slug: Second Mission.
- Ascended Extra: Unlike other instructors, she has given larger roles in certain games. In Second Mission, she appears as mission control in the main adventure and even shows up in certain missions as the end goal. In Defense, she hosts the game's events.
- Art Shift: Metal Slug Defense uses her sprites in X for the Events and her new artwork for the Combat School.
- Drill Sergeant Nasty: A jerk to you on the lower ranks, although she'll soften up as you rise among the ladder.
- Early Installment Character-Design Difference: Wore a green military dress in X before changing to a blue dress for Second Mission onward.
- Easter Egg: Touching her breasts in Metal Slug Defense will cause her to react depending what rank you are in.
- Eyes Always Shut: If she opens them, you've either impressed her, or you've made a complete ass of yourself.
- Hair Color Dissonance: It's uncertain if her hair is blonde or lightish brown but sometimes her hair is represented by a darker shade of brown.
- Like a God to Me: Hitting the Super Devil rank will make her admire you to the point of calling you "Her Majesty".
Riviera "Lilly" von Wittenberg
One of the two drill instructors in Metal Slug 6.
Maryell "Mary" von Wittenberg
One of the two drill instructors in Metal Slug 6.
The first Slug in the series, and the titular Metal Slug. Capable of shooting a vulcan machinegun 360 degrees and a low-velocity round forwards but incapable of turning around, and has a reduced jump. Variations include the Type-R, which sacrifices power for maneuverability, the Experimental, which sacrifices maneuverability for power, the Type-B, which is stronger in all areas, the Bronze, which is never used by the player, SV-001, a less defensive prototype, and the Black Hound, a Ptolmaic-made variation the is remotely controlled and equipped with a laser and homing missiles.
- A.I. Is a Crapshoot: The Black Hound's an AI-controlled tank that goes rampant, attacking/killing its own Ptolemiac allies in the area before you face it.
- Averted with MS-Alice, who is completely loyal to Marco for creating her..
- Armored Coffins: There's no way to easily bail out of the 000. Either you get out after defeating all enemies, or you die.
- Armor-Piercing Attack: Any of them can acquire Armor Piercing Shells, which do extra damage against enemy tanks, and, most importantly, fly all the was across the screen and are spammable.
- All Your Powers Combined: The Type-B has the positive traits of the Experimental and the Type-R
- Backwards-Firing Gun: The SV-001 Type-R in the first level of the third game has the unique property of firing in the direction opposite the player points. This is important, since the first boss is spent frantically running away from it.
- Bonus Boss: Fighting the Black Hound is entirely optional in a secret area, and it gives no reward.
- Escape Pod: They are equipped with a floatation device, which is buoyant enough that the player can survive falling from space with it.
- Mini-Boss: The Black Hound first appears as an optional boss in 5 before becoming playable in Advance.
- Mighty Glacier: They all take two to five hits to the player's one. However, their overall slower speed and lower jump height also makes dodging harder.
- Red Ones Go Faster: The Type-R is orange.
- Super Prototype: Ad advantage the 000 has over the 001 is the ability to turn around fairly easily. Unfortunately, the exit hatch is easily warped, making the thing into a deathtrap if it gets hit at all.
- Suicide Attack: Pressing Fire and Jump while in it will cause it to rush forward and explode.
A sideways-walking, high-jumping slug designed for mountainous terrain. First appears in 2 and has had consistent appearances since. It is equipped with two Vulcan Cannons, as well as a third, downward facing cannon, whose ammo varies depending on the game. The standard Slugnoid and the higher-grade blue-tinted Type-B use Flame ammo, which spreads in all directions when hitting a surface, while the Walker Slugnoid and the deep-red Slugnoid Type-R fire Fat Lizards. The Type-B features even greater jump height.
- Action Bomb: The Fat Lizard ammo, used by the Walker Slugnoid and the Type-R, which is a small ball with legs that runs to the left of the player, then explodes.
- This Looks like a Job for Slugnoid: It's only ever really able to shine in situations that require more vertical movement than horizontal. In 2,, the fact that its missile travel downward means its only really useful when an enemy is directly below you. It appears to be designed with fighting the second boss of 2, its first appearance, in mind.
- Glass Cannon: While its firepower is stronger than the Slugnoid, it's very cumbersome to use, making it hard to keep it around. In comparison to other Slugs and the players it's still a mighty glacier.
- In A Single B Ound: The Slugnoid's specialty, which is improved even more for the Slugnoid Type-B.
- Jump Jetpack: Its high jumps are jetpack-assisted
- More Dakka: It has two cannons as opposed to one.
- Nerf: X makes some levels harder by replacing the SV-001 with the more awkward Slugnoid.
- Red Ones Go Faster: The Type-R, but it's still not as fast as even the SV-001 Experimental.
- Shows Damage: Taking damage causes the Slugnoid to lose a gun.
- Walking Tank: It's on two short, if stubby, legs.
A camel equipped with one or two Vulcan Cannons. First appearing in 2 to assist the player during the first Arabian levels, it leaves the player during the second. After returning when the protagonists return to the desert in 3, it remained absent from the series until Defense. It is notable for being the first animal Slug in the series. it does not carry its own bombs, so the player instead throws their own grenades while on the camel.
- Automaton Camel: Averted in one instance. After the first level of 2 or X, it will neglect to follow the protagonist, to remain near a water source. Otherwise, it is incapable of being hurt.
- Denial of Diagonal Attack: While its cannon can fire in all directions, it can't turn around. So you will only be able to throw grenades forward while on it.
- Fragile Speedster: Faster than the other tanks, and faster than the player when runnning. However, outside of elevating the player above low-ground attacks, it offers no protection.
- Lovable Coward: It refuses to follow the protagonists into an ancient tomb, or into an army of man-eating plants, but is invincible when you do have it.
- Non-Indicative Name: It's actually a Dromedary, not a camel.
- Truth in Television: Camel-mounted machine guns actually existed in real life, called zamburaks.
A tiny jet first appearing in 2, and every game except 4 since. It's equipped with two 10mm cannons which can fire 30 degrees above or below it, as well as Sidewinder missiles that fire directly forward. It's only variation is the Slug Jet, which is controlled by an NPC instead.
Slug Flyer tropes
- David Vs Goliath: The fight between Slug Flyer and Shooting Ray in 5 shows that the Flyer is barely the size of a single engine of the Shooting Ray.
- Homing Projectile: Its missiles orient themselves slightly on their own.
- Jet Pack: Starting in 3, many of them contain a jetpack and goggles for the player, for if the Flyer gets destroyed.
- This Looks Like a Job for Aquaman: Only ever available when enemy planes are about.
A weaponized elephant found in a Sasquatch cave in 3. After freeing it from a tomb of ice, the player can ride to gain an advantage against invading zombies, who have slaughtered the native Sasquatches. It is capable of shooting electricity and fire from its trunk.
Elephant Slug tropes
- Fire-Breathing Diner: To gain the ability to shoot fireballs, it must pick up a hot pepper.
- Mighty Glacier: While it does not technically offer any protection, it is so tall that almost no zombies that are on the same floor as the player can hit them. Meanwhile, it can't jump is as slow as molasses.
- "Shaggy Dog" Story: It starts to help you after you free it from the ice its trapped in. In the end, the player either abandons it among the zombies or leaves it trapped in another pool of ice.
- Shock and Awe: It can breathe electricity if it ears a car battery.
- Trampled Underfoot: It can kill a zombie merely by walking over it.
A small one-seater sub with a high mass Vulcan and torpedoes that sink to the floor, which appears in 3 and 5. A variation, the Slug Sub, is capable of anti-air combat and has an additional supply of depth charges.
Slug Mariner tropes
- Cave Behind the Falls: One inexplicably holds two Mariners in the third stage of 3.
- Inertia Is a Cruel Mistress: It uses high-mass rounds, giving it serious difficulty when shooting from below
- Shout-Out: The Slug Sub is a direct recreation from the submarine from In The Hunt, while the Slug Mariner is essentially a chibi Thunderbird 4 from Thunderbirds.
- Super Prototype: The Slug Sub is actually the prototype of the Slug Mariner, despite its more diverse moveset.
A Regular Army variant of the common rebel M15 Bradley, that was stolen from the Regular Army.
Bradley Slug tropes
- Cutscene Power to the Max: Jumping into it for the first times has the player turn the Bradley Slug around to face the correct direction, something that would be incredibly useful to do in game but is impossible for the player to do.
- Good Colors, Evil Colors: Bright Green to represent the Regular Army, as opposed to the grey/dark green of the bad guys.
- Glass Cannon: It houses one of the most powerful secondary fires available, but is very fragile
- How Do I Shot Web?: Despite being found in the hands of rebels, they don't have any idea how to work its vulcan cannon or its jumping ability, only knowing how to operate its indirect missile fire like their standard Bradleys.
- Jump Jetpack: Is jumps with the help of a thruster beneath its treads.
- Mercy Invincibility: Subverted. It receives no invincibility and can even be hit multiple times with the same bullet.
The SVW-001 Slug Gunner and its variants are considered the final evolution of Metal Slugs. Walking on two legs for mobility, or on treads for speed, this type has the highest firepower but lowest speed of common slug types. Variants include the Proto Gunner, which is an quicker, unarmored version, and a multitude of mask-differentiated enemy variants. It is based on the rebel-designed LV Armor, which itself has variant branches of design in the more compact Slug Armor and the mass produced Ptolemaic Unit. The Ptolemaic Unit itself has four variants: Armor, Claw, Gunner, and MG=} (Machine Gun).* AwesomeButImpractical: The LV Armor, unlike other slugs, requires ammo, can't shoot diagonally (some of them can do the heavy machine gun spreading motion), and takes one full second to jump makes it a liability at the worst of times.* CloseRangeCombatant: The Ptolemaic Claw Unit is the only Armor to have to projectiles at all, only using its fists. Conversely, the [=MG has only guns and no ability to melee.
- Denial Of Diagonal Attac K: The LV Armor has a major deficiency in its ability to shoot diagonally, which even applies to heavy machine gun ammo.
- Double Jump: Most kinds can use rockets to boost itself once in the air.
- Gatling Good: One of the Slug Gunner's arm is equipped with a gatling gun.
- Mini-Mecha: They are mechas as large as the slug units.
- Transforming Mecha: The SVW-001 can morph between a Tank and a Mecha.
- Pile Bunker: The Slug Gunner has a pile bunker powered by revolving chamber.
- Super Prototype: For those who prefer speed over mobility, the Proto Gunner is actually better.