The Rebel Gigant is the sixth boss from Metal Slug 7.


A huge mech which was developed by the Future Rebel Army and brought into present day. It was specifically designed to be controlled by Demon Seargant. Despite of its huge body and very tough armor it possesses great agility. It is also equipped with various weaponry such as homing missiles and floating mines.


Its attacks vary from firing rockets from the shoulder to jumping off screen and sliding into the player's Gigant. It is fortunate that death here allows another Slug Gigant to be employed after respawning (the Slug Gigant's destruction kills the player), as the Rebel Gigant would easily defeat the player otherwise. Note however it is possible to fight and defeat this boss on-foot using nothing but a pistol through a War Room mission.


Original: The original variant ridden by Allen O'Neil himself, it appears in both Metal Slug 7 and Metal Slug XX.

MK II: The upgraded variant of the predecessor, ridden by an enraged Allen O'Neil, appears only in Metal Slug Attack.

Rogue Gigant: Another variant of the predecessor, this time being ridden by Allen Jr.. It fires red floating mines that emit fireballs instead. Only appears in Metal Slug Attack.


  • This is the only time Allen is not holding his M60 as a weapon, and has his hands on his hips.
    • Though after he is defeated, he can be seen firing it in defeat.
    • This is also the second time Allen appears as a boss, rather than this usual mid-boss status.
  • In Metal Slug Defense. The Rebel Gigant was an unlockable unit in 1.32.0 Event world Release the Giant sleeping weapon. The Rebel Gigant's special move is dashing forward and crushing an enemy with its size, this attack appears in both MSD and MSA. The unit is now purchasable in the Shop for 500 Medals.
    • Also, The Rebel Gigant's official name was confirmed in MSD 1.32.0 update.
  • In Metal Slug Attack the Rebel Gigant is featured in an unlockable Rare Boss stage, with no name given. As of 1.20, Rebel Gigant is now a playable unit which requires 80 parts to unlock it. Acquisition of the unit can only be found by the Medal Crank (or a possible rare chance earn-able in POW Rescue).
    • When all skills unlocked, Rebel Gigant have chance to stun enemies with using any attack, and special attack is changed, previously it dash forward and then jump backwards,when upgraded, after dash forward it will jump forward, crushing air unit and land as well
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 Brave Guerrier | Toschka Dalanue | The Iron | Big John | Sea Satan | Amadeus Mother Computer

Mecha Allen O'Neil

Metal Slug 5 Metal Rear | Shooting Ray | Wall Crawler | Sand Marine | 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 | Electromagnetic 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 Launch Support Van | Mosque Artillery | Spider-Bot | Underground Cruise Missile | Morden's Battleship | Morden's Castle | Allen O'Neil | Lugus | Lieu
Metal Slug Attack Pharaoh's Arc | Ball Slug | Great Mother | K-O3 Coupled Armored Vehicle | Land Blowfish | Cyclobster | Slug Square | Zoni Doloma
Mobile games Rocket Control Room | Unknown Alien | Hellfire | Spiderbot | Cyclops | Mega Laser Turret | Mars Battle UFO | M-32 Water Carrier Plane | Kourai | Alien Floating Structure