Metal Slug Wiki

Mecha Allen also known as Steel Allen is a robotic copy of Allen O'Neil that serves as the penultimate boss of Metal Slug 4.

Information[]

Like the Morden Robot, it was created by the Amadeus Syndicate to fool the Regular Army into believing that the Rebel Army's higher-ups were taking direct part of the White Baby Crisis by pitting them against the "Immortal Devil Sergeant" himself.

Mecha Allen is a perfect robotic copy of Allen O'Neil nailing both appearance and combat abilities. It can be easily mistaken for the real one due to the real Allen always cheating death and coming back to challenge the Regular Army commandos for another fight. Visually, the only difference is that Mecha Allen uses blue bullets instead of the standard orange.

Mecha Allen first appeared operating the Toschka Dalanue in Mission 2 and is once again thought to be defeated after the tower is destroyed. During the final mission, Mecha Allen is encountered again in a factory guarding the entrance to the Amadeus Mother Computer. Mecha Allen eventually sustains enough damage that its artificial skin gets damaged and is revealed to the heroes to be a fake robot.

Boss Synopsis[]

The fight with Mecha Allen is similar to the Allen O'Neil fight in boss patterns and arena layout. The only difference is that its melee attack does not kill the player; instead, the player is knocked a great distance and loses their weapons. After enough damage has been dealt, Mecha Allen revives itself and gets more aggressive. When Mecha Allen is completely destroyed, the dropped M60 can be picked up and used as a Heavy Machine Gun.

In Other Games[]

Metal Slug Attack[]

Mecha Allen appears as a playable unit for the Independent Army, including new variants created by the Amadeus Syndicate. Unlike Metal Slug 4, Mecha Allen is always in its robotic state. It also operates an Amadeus variant of the Hairbuster Riberts.

In Another Story, Allen O'Neil and Abigail encountered multiple Mecha Allens being controlled by White Baby. Most of them are fend off by Allen.

Metal Slug: Awakening[]

Mecha Allen returns as a recurring boss for the Rebel Army and is referred as Steel Allen. unlike past games where it is a separate entity to Allen. it's likely that they are both the same character, even Marco referred to them as Allen.

Variants[]

Mecha Allen: The original.
Mecha Allen II: An improved version of Mecha Allen developed to analyze the adrenaline emitted by the angry Devil Sergeant of the Rebel Army. Its physical abilities are greatly improved compared to Allen O'Neil in his normal state.
Golden Mecha Allen: A Golden Variant operating a modified version of the Toschka Dalanue painted in gold. Appears in Metal Slug Attack.

Gallery[]

Sprite and Model Gallery[]

Trivia[]

  • Mecha Allen is likely based off the Terminator.
Metal Slug 4
Heroes Marco RossiFio GermiTrevor SpaceyNadia Cassel
NPCs Tarma RovingEri KasamotoPOW (Names) • Rumi AikawaMadoka AikawaHyakutaro IchimonjiPresidentDonald MordenAllen O'NeilDoctorRebel ArmyAmadeus SyndicateShop LadyFinnMountain BearHaunted House Employees and AttendeesMinersSailors
Enemies Rebel InfantryAmadeus InfantryFanaticsGrenade SoldierBazooka SoldierShielded SoldierBikersRebel RiflemanMortarGatling SoldierHazmat SoldierPiratesScientistsSasquatchMummiesDog MummyChariotZombiesTar ManSupervisory CameraPatrol RobotMorden RobotAmadeus Robot
Enemy Vehicles Di-CokkaM-15AT-2B Melty HoneyMV-280BNop-03 SarubiaGirida-OTurretsParachuetruckM34 3-Ton TruckR-ShobuMH-6S MasknellFlying TaraEaca-BHammer-YangLandseek
Bosses Brave GuerrierToschka DalanueThe IronBig JohnSea SatanAmadeus Mother Computer
Mini-Bosses: Mecha Allen
Weapons Heavy Machine GunRocket LauncherShotgunFlame ShotEnemy ChaserIron LizardSuper GrenadeDrop ShotTwo Machine GunsGrenadeFire BombStoneThunder Cloud
Slugs SV-001SlugnoidBradleyMetal ClawWalking MachineForkliftMotorcycle3-Ton TruckRegular Army Helicopter
Missions Let's Run Through!Show SpiritSnowy RoadCadaverousGo Ahead!Secret Place
Other Metallish SystemTransformationsItemsEnvironmental ObjectsRA-TTTHoist
Bosses
Metal Slug TetsuyukiHairbuster RibertsTani OhShoe & KarnIron NokanaHi-Do
Mini-Bosses: Mini-BataAllen O'Neil
Metal Slug 2/X The Keesi II / Iron Nokana MK II (X) • Aeshi NeroDragon NosukeBig ShieeHozmiRugname
Mini-Bosses: Mosque ArtilleryThe Keesi II (X) • Karn (X) • Allen O'NeilDai-Manji
Metal Slug 3 Huge HermitMonoeye UFOJupiter KingSol Dae RokkerRootmars
Mini-Bosses: Twin Ohumein-CongaMonoeyesHairbuster RibertsHi-DoRugnameFake RootmarsClone Incubator
Metal Slug 4 Brave GuerrierToschka DalanueThe IronBig JohnSea SatanAmadeus Mother Computer
Mini-Bosses: Mecha Allen
Metal Slug 5 Metal RearShooting RayScreamerSand MarineAvatar of Evil
Mini-Bosses: Black HoundStone Turtle (unused) • Gaia ElephantPtolemaios (unused)
Metal Slug 6 Bull DrillIron SentinelBrain RobotElder CentipedeInvader King
Mini-Bosses: Invader ControllerKing's Cocoon
Metal Slug 7/XX Iron Death WormCrablopsDestroyed CrablopsFall ClimberThe UnionRebel GigantKraken
Mini-Bosses: Scrap TowerBig Gate
Metal Slug: 1st Mission Rebel VTOLRebel TrainMacbaRebel ZeppelinElectromagnetic CraneWeapons Port BossMetal Strider
Mini-Bosses: Facility ElevatorMacbaRebel Truck
Metal Slug: 2nd Mission Big BerthaTerrain CarrierRebel ReactorMacbaRebel SubmarineRebel BlimpTani OhWiredRebel AirplaneMetal StriderRocket UFO
Mini-Bosses: Power GeneratorsRebel RocketHyakutaro
Metal Slug Advance FormorEmain MachaKaladgolgThe Keesi IIICabracan
Mini-Bosses: Allen Jr.
Metal Slug 3D Spider-BotUnderground Cruise MissileMorden's BattleshipMorden's CastleLugusLieu
Mini-Bosses: ParachuetruckMosque ArtilleryAllen O'Neil"Rebel Destroyer Ship"
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Mini-Bosses: The Keesi IIAllen O'NeilIron NokanaMetal RearHellfire Bat KingShabtiBlack Hound
Joint Operation: VolmesFireflyGenaroKatherineSilenceMechanistSix-Armed Machine
Joint Operation Abyss S1: BeruaMeiruizigeMech Hermit CrabMachine GuardMaat
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Others: Dr. NeanderRift Crystal BeastCalamity Crystal BeastCalamity SnakeEye of CalamityTreasure Bowl
Flashback Mode: Hairbuster RibertsTetsuyukiMini-BataMosque ArtilleryGreen Ohumein-CongaRed Ohumein-CongaHuge HermitBig ShieeTani OhBig JohnHi-DoBombardier CaptainDragon Nosuke
Mobile Games Rocket Control RoomUnknown AlienHellfireSpiderbotCyclopsMega Laser TurretMars Battle UFOM-32 Water Carrier PlaneKouraiAlien Floating Structure
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