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Boss! Artwork

Bosses are enemies that always appear at the end of a mission. The player is forced to eliminate it in order to advance through the game. Bosses are always hard to kill and are mostly supported by other basic troops. This is a list of bosses found in the Metal Slug game series.

Metal Slug

Mission 1

  • Tetsuyuki (Improvised fortification constructed from a crashed Type 770 Takatsu-class aerial gunboat/bomber)

Mission 2

  • Mini-Bata (Self-propelled railway gun; mini-boss)
  • Hairbuster Riberts (Prototype rebellion Heavy Bomber controlled by Donald Morden)

​Mission 3

  • Allen O'Neil (Immortal elite soldier from the Rebel Army; mini-boss)
  • Tani Oh (Giant self-propelled artillery armed with andro cannons)

​Mission 4

  • Shoe & Karn (Cooperative mission tanks designed to cover each other's backs, acting in tandem)

​Mission 5

  • Iron Nokana (Multi-role combat vehicle designed primarily to hold up large troop movements)

Final Mission

Metal Slug 2

Mission 1

​Mission 2

  • Aeshi Nero (Giant subterranean excavator, basically a huge robot snake with a hypercharged andro cannon in it's mouth)

​Mission 3

  • Dragon Nosuke (Platformed urban tank used to defend vulnerable trains with a variety of weaponry)

​Mission 4

  • Big Shiee ("Amphibious vehicle of destruction", basically a naval battleship on tracks)

​Mission 5

  • Hozmi (Covert operation submarine built by the rebels using supplied Martian technology)

Final Mission

  • Allen O'Neil (mini-boss)
  • Dai-Manji (UFO armed with energy bombs and an electric beam projector; sub-boss)
  • Rugname (Martian mothership which has an underside port for a Dai-Manji to dock onto, hypercharging it's electric beam into a lethal laser)

Metal Slug X

The bosses of Metal Slug X are mostly the same as Metal Slug 2, but with some changes

Mission 1

  • Iron Nokana MK II (Multi-role combat vehicle designed primarily to hold up large troop movements)

Mission 3

  • The Keesi (VTOL heavy bomber, a combined bomber and troop transport; mini-boss)

Metal Slug 3

​Mission 1

  • Twin Ohumein-Conga (only in the underwater route, these brown variant posses heavy armor and shots acid-bubbles that float upwards; mini-boss)
  • Huge Hermit (Giant hermit crab whose current shell used to be a large tank)

Mission 2

  • Monoeyes (Six alien guardians; sub-boss)
  • The Ten Commandments of Moses (Alien artifact used by the Martians for a first strike, which defends itself by starting off a zombie plague among people near it)

Mission 3

  • Jupiter King (Giant nuclear-powered robot which defends the rebels' underwater weapons factory)

Mission 4

  • Sol Dae Rokker (Japanese sun god's instrument, which in truth is a martian weapon)

​Final Mission

  • Hairbuster Riberts (The same aircraft from the first game but controlled by Allen O'Neil; mini-boss)
  • Hi-Do (The same attack helicopter from the first game but controlled by a Martian in disguise; mini-boss)
  • Rugname (Martian mothership, you have to fight three Dai-Manjis; mini-boss)
  • Rootmars (Leader of the Mars People, who looks like a huge martian with an exposed brain; boss and mini-boss)

Metal Slug 4

​Mission 1

Mission 2

  • Toschka Dalanue (Pillbox tower "Toshka Dalanue" controlled by Allen O'Neil)

Mission 3

  • The Iron (Improved multi-role combat vehicle "Iron" controlled by Donald Morden)

Mission 4

  • Big John (Giant machine doll converted by the Amadeus syndicate to carry zombie and mummy plagues)

Mission 5

​Final Mission

Metal Slug 5

​Mission 1

  • Black Hound (Ptolemaic enchanced version of the Metal Slug; secret mini-boss)
  • Metal Rear (Ptolemaic Ultra-giant Metal Slug: Unit #04 "Metal Rear")

Mission 2

  • Shooting Ray (Ptolemaic Large-sized aerial aircraft carrier: Unit #03 F-502 "Shooting Ray"/Horten Ho 229)

Mission 3

  • Wall Crawler (Ptolemaic special unit: Unit #01 "Wall Crawler")

Mission 4

  • Sandmarine (Ptolemaic amphibious assault landing ship: Unit #02 "Sandmarine")

​Final Mission

Metal Slug 6

Mission 1

Mission 2

  • Iron Sentinel (Large rocket launching tank that slides the downhill controlled by Donald Morden)

Mission 3

  • Brain Robot (Invader robot controlled by a giant brain)

Mission 4

  • Sea Worm (Giant Invader worm found in the ocean)

​Final Mission

Metal Slug 7

Mission 1

  • Worm Mecha (Giant worm-like drill machine controlled by Donald Morden)

Mission 2

​Mission 3

  • Destroyed Crablops (The same robot from Mission 2 but this time its legs are separated from its head)

Mission 4

  • Fall Mecha (Giant gorilla-like robot that climbs the waterfall)

Mission 5

  • The Union (Vehicle that can separate in three different parts)

​Mission 6

​Final Mission

  • Kraken (Giant octopus-like robot controlled by Donald Morden)

Metal Slug Advance

Mission 1

  • Formor (Rebel version of the metal slug tanks, twice as big and has same weapons)

Mission 2

Mission 3

  • Kaladgolg (Basically the Tani Oh on a railway flatcar and not a giant tank)

Mission 4

  • The Keesi III (An improved version of The Keesi II from Metal Slug 2)

​Final Mission

  • Allen Jr. (Son of Allen O'Neil from the Rebel Army; optional mini-boss)
  • Cabracan (Powerful device that can make earthquakes)

Metal Slug: 1st Mission

Mission 0 (Emergency Mobilization)

  • Rebel VTOL (A hovering Rebel aircraft that fires with its Vulcans)

Mission 3 (Battle in the City)

Mission 6 (Penetration of the Front Base)

  • Macba (Lieutenant Colonel who fights with knives)

Mission 10 (Night Flight)

Mission 12 (Weapons Dump)

Mission 14 (Weapons Port)

Mission 16 (Fierce Battle)

  • Facility Elevator (Similar to the Electromagnetic Crane, expect the blocks contain enemies and the conveyor belts are missing).
  • Macba
  • Rebel Truck (Rebel vehicle that slowly inches to the player)
  • Hilde Garn (The commander of the PHANTOM Squad riding his personalized Slug)

Metal Slug: 2nd Mission

Mission 1 (The Front Line)

  • Big Bertha (Large cannon stationed on a Rebel train)

Missions 8 and 10 (War-Torn City and Terrain Carrier)

  • Terrain Carrier (Land Battleship with two sets of cannons to destroy)

Missions 14 and 15 (Reckless Reactor and Into the Fray)

  • Rebel Reactor (Large reactor with security on the sides and a Gatling gun in the middle)

Mission 18 (Pursuit)

Mission 20 (The Enemy Below)

  • Rebel Submarine (Aquatic vehicle that fights on the bottom of the sea)

Missions 23 and 24 (The Tundra King and The Ice Queen)

  • Tani Oh (Rebel tank that fires landmines and a laser)

Mission 26 (Decoy Strategy)

  • Lt. Wired (Macba's second-in-command who dual-wields guns and tosses grenades)

Mission 31 (The Fortress)

Mission 32 (Ocean Depths)

  • Rebel Submarine (Aquatic vehicle fighting the Slug Sub)

Mission 34 (The Stronghold)

Mission 35 (Menace Out of the Skies)

  • Rebel Airplane (Rebel aircraft fighting the Slug Flyer)

Mission 37 (Lone Assault)

  • Macba (Secret boss found on a specific route in the trolley section)
  • Hilde Garn's Slug (A reconstructed boss without the titular owner)

Mission 38 (Termination)

  • Rebel Rocket (Three phase fight with the main Rebel weapon)
  • Rocket UFO (Rocket's top fighting with homing missiles and a claw)
  • Kanan (Commander of the PHANTOM Squad and the construction of the Rebel Rocket. Uses his rifle as his last resort)

​Mobile Games

Metal Slug Mobile Impact

Mission

Universal Metal Slug

Mission 1

  • Tetsuyuki (Identical to the boss from Metal Slug but covered with plants)

Mission 2

  • Tani Oh (The same boss from Metal Slug)

Mission 3

  • Hi-Do (A blue version of the final boss from Metal Slug but with the number 5 instead of 6 on its door, and Donald Morden is not in it)

Universal Metal Slug: Tank Conspiracy

Mission 1

Mission 2

  • Hozmi (Boss from Metal Slug 2 with different colors)

Mission 3

  • Unknown Alien (Giant alien who made a nest in some place on Earth)

Universal Metal Slug: Fierce Battle

Mission 1

  • Hellfire (Giant blue tank that fires rockets)

Mission 2

Mission 3

  • Cyclops (Giant four-legged robot with vulcan arms)

Mission 4

  • This mission doesn't have a boss but has a red R-Shobu at the end.

Final Mission

Universal Metal Slug: Triumph

Mission 1

Mission 2

Mission 3

Final Mission

Bosses
Metal Slug Tetsuyuki | Hairbuster Riberts | Tani Oh | Shoe & Karn | Iron Nokana | Hi-Do

Mini-Bata | Allen O'Neil

Metal Slug 2/X The Keesi II / Iron Nokana MK II (X) | Aeshi Nero | Dragon Nosuke | Big Shiee | Hozmi | Rugname

Mosque Artillery | The Keesi II (X) | Allen O'Neil | Dai-Manji

Metal Slug 3 Huge Hermit | The Ten Commandments of Moses | Jupiter King | Sol Dae Rokker | Rootmars

Twin Ohumein-Conga | Monoeyes | Hairbuster Riberts | Hi-Do | Rugname

Metal Slug 4 Bura Gariae | Toschka Dalanue | The Iron | Big John | Sea Satan | Amadeus

Mecha Allen O'Neil

Metal Slug 5 Metal Rear | Shooting Ray | Wall Crawler | Sandmarine | Evil Spirit Incarnate

Black Hound | Stone Turtle (unused) | Mammoth Tower | Ptolemaios (unused)

Metal Slug 6 Bull Drill | Iron Sentinel | Brain Robot | Sea Worm | Invader Queen

Invader Controller

Metal Slug 7/XX Worm Mecha | Crablops | Destroyed Crablops | Fall Mecha | The Union | Rebel Gigant | Kraken
Metal Slug: 1st Mission Rebel VTOL | Rebel Train | Macba | Rebel Zeppelin | Eletromagnetic Crane | Weapons Port Boss | Hilde Garn

Facility Elevator | Macba | Rebel Truck

Metal Slug: 2nd Mission Big Bertha | Terrain Carrier | Rebel Reactor | Macba | Rebel Submarine | Tani Oh | Gunslinger | Rebel Submarine | Rebel Airplane | Hilde Garn's Slug | Rocket UFO

Rebel Rocket | Hyakutaro

Metal Slug Advance Formor | Emain Macha | Kaladgolg | The Keesi III | Cabracan

Allen Jr.

Metal Slug 3D M-3 Rocket Van | Mosque Artillery | Spider-Bot | Rebel Underground Drill | Big Shiee | Morden Castle | Allen O'Neil | Lugus | Lieu Monster
Mobile games Rocket Control Room | Unknown Alien | Hellfire | Spiderbot | Cyclops | Mega Laser Turret | Mars Battle UFO | M-32 Water Carrier Plane | Mecha Kaiju | Alien Floating Structure

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