Metal Slug Wiki
Metal Slug Wiki

The Elder Centipede (or the Sea Worm) is the fourth boss of Metal Slug 6.


The Elder Centipede is a mysterious sea creature that has been existed since ancient times. This gigantic creature is believed by some biologists to be an ancient arthropod due to the unknown microorganisms that are attached to it. With its ability to attack moving objects and inject lethal microorganisms, many militaries from each nation believe that it could be used as a biological weapon in space.[1]

Boss Synopsis

Most of the attacks aren't really that hard to dodge, but the Elder Centipede will be constantly changing position, so be ready for a difficult fight. When it appears, depending on the difficulty, it will start off by spitting about 3 to 8 acid spit projectiles at the player, so go underneath its head to avoid these. Get away when it stops, though, as it will begin to spiral in a circle off the screen and kill the player if caught in the middle. It will reappear on the right, spiraling towards the player. Jump on to its body to avoid being skewered by its head.

The Elder Centipede floats upright and fires a few more acid spit shots at the player. It then twists its entire body around, causing razor sharp wind to appear around each segment. A well timed jump avoids this.

Again, it will spiral in a circle, so the player must make sure to not be stuck in the middle. It reappears the left side, and will spit a trail of acid spits which goes up and down the stage. Hide under the Big Shiee to avoid this. After this, it repeats until half of its health remains and starts to combust.

When it's flaming, it will spiral around the center, firing five energy blasts at the player. Just dodge over these or shoot them, and finish it off. If the Slug Flyer is still available, this battle is made easier/harder depending on the player's skill as the Elder Centipede will spit its acid much faster.

Other Appearances

The Elder Centipede appears in Metal Slug Attack in the Extra Ops "Task Force 2nd" sharing a similar moveset as in the original game but is unable to generate razor sharp wind on its body. It also possesses the ability to weaken the attacks of enemies and lower their resistance to other attacks, causing them to take more damage than usual while also receiving less damage itself. Since the Elder Centipede now fights on land, it moves by dragging itself partially buried through the ground.

The Elder Centipede is further mentioned as an unaffiliated unit (not with the Invaders). The micro-organisms on its body contain an extremely deadly virus that weakens opponents (hence its skills in-game).


Elder Centipede: The original version.
Magma Centipede: The Elder Centipede, who has mutated once more in a volcanic environment. It still retains its deadly micro-organisms, except the acid spray has mutated into a jet of fire following its mutation.

Elder Centipede's Offspring: Elder Centipede's children,


  • Concept art for the Elder Centipede, labeled the Sea Worm, had its entire body resemble an actual worm. Its inner mouth was able to of an average adult.
  • Extend to snatch up the player characters, and the end of its tail would've released flying drones.
  • The Elder Centipede is reminiscent of the Sandworms of Arrakis from the classic sci-fi novel series Dune. Both are also formidable.
  • The Worm Mecha from Metal Slug 7/XX resembles the Elder Centipede in terms of movement and the ability to move its separate body parts.
  • It is currently unknown if the Elder Centipede is a combination of a mutated animal and a machine. This is evidenced by the creature showing smoke emanating from its body after it has been heavily damaged, and that more smoke spews out after its scales become damaged and chipped-off after suffering heavy fire.
  • The ship present before the boss fight resembles the Big Shiee but without its weapons. It is believed that the Big Shiee was attacked by the Elder Centipede.



  1. Metal Slug Attack in-game description
Metal Slug 6
Heroes Marco RossiTarma RovingEri KasamotoFio GermiRalf JonesClark Still
NPCs Riviera von WittenbergMaryell von WittenbergPOWRumi AikawaMadoka AikawaHyakutaro IchimonjiDonald MordenRebel ArmyChinese SoldierMartiansRootmarsInvadersAnnouncerDuke KoudouPupipi
Enemies FanaticsGrenade SoldierBazooka SoldierShielded SoldierRebel RiflemanMortarGatling SoldierHuntersMars PeopleMini-UFOInvader SquadWinged InvaderFlying ParasiteHunter WalkerGiant Hunter WalkerSpace Mole CricketCrab-TankVanguardSmasherInvader UFOFlying SheltFlying CoreFlying KillerMaggot
Enemy Vehicles Di-CokkaT-2B Melty HoneyMV-280CNop-03 SarubiaGirida-OM-15A Bradley3-ton Utility TruckWalking LocomotiveR-ShobuMH-6S Masknell
Bosses Bull DrillIron SentinelBrain RobotElder CentipedeInvader King
Mini-Bosses: Controller
Weapons Heavy Machine GunRocket LauncherShotgunFlame ShotEnemy ChaserIron LizardSuper GrenadeDrop ShotTwo Machine GunsZantetsu SwordGrenadeFire Bomb
Slugs SV-001 (Type-R) • Slug FlyerDonkey SlugProtogunnerRootmars SlugSlug Digger
Missions African WindsThe Illusion of El DoradoAsian ImpactGolden Bridge is Falling DownAncient Law
Other Combat SchoolWeapon StockRush Blaster System
Metal Slug Attack
Main Characters Marco RossiEri KasamotoTarma RovingFio GermiDonald MordenAllen O'NeilAbigailPtolemaiosDragunovYoshinoProfessorRed Goblin
Factions Regular ArmyRebel ArmyPtolemaic Army • Space Army (MartiansInvaders) • Independent (Amadeus SyndicateMummy Army)
Sub-Groups Metal Device ProjectBlaze BrigadeFrozen BrigadeACEMutantsBelieversMars People RangersMetzeleisValerian BearsRed Goblin SocietyVampiresYuki Tsuki HanaWorld Military Corp.
Other List of Metal Slug Attack Characters
Vehicles and Slugs
Regular Army Slug AttackerSlug DefenderSlug RisingTS-001Ball SlugGiant CopterSlug SquareTiger SlugCoil TankTail SlugAshley's Slug FlyerPatrol SlugPhi's 3D PrinterSlug Sniper
Rebel Army Iwa OhJulia's MV-280NaglfarDenturionAlesha's BikeArmed TiltrotorVicky's SarubiaDolores' SarubiaNantes' TankEmma's Recycle BoxLoretta's Blaze VortexMarineskFight CabFluffymeranianEight Eight
Ptolemaic Army D-001 TanbalTowa's MechGIP-03 BergeniaSnordonGlidronHumphrey's HoverboardHammer DX5005Sisilia's Seaside Machine
Space Army Mars GigantalosMars SweeperPurple KingLeone's ShoePauline's Mech
Independent Army El Dorado's Slug ArmorMinerva's OstrichMaya's ExcavatorKagura's Samurai MechSharifa's Golem
Mechanized/AI/Unmanned MS-AliceMS-HeartWadeWhite BabyFirst BabyIron FortressMachynaType:Ant-LionPhi
Extra Ops PtolemaiosSky Jupiter KingDoctor Type: AISea Dragon
Recapture Mega Drill SlugQueen Big SnailRiviere HyllGaia ElephantMetal Fusioner No.223Drum Slug |Mars WolfTetsujin Squad
Try Line Ball SlugGreat MotherK-O3 Coupled Armored VehicleLand BlowfishCyclobsterSlug SquareZoni DolomaQuadro JumperFortmeranianGiant CopterFlying HermitEt A OmnisElement GiantMini-BataDigger BaseScreamerAirborne DenturionMass Production Tail SlugSlug StrikerArms CopterFlying Hermit ACEEarth Monster VaikomWater God
Task Force Rock MoleElder CentipedeRunaway Brain RobotMaster KrakenD-GuAstro SlugMonoeye GateCrusty LegsArmored CrawlerClone Incubator7000 Class LocomotiveFrozen VortexCoil TankJupiter TankGuardian of the CryptKing's Cocoon
Ultimate Mission Golden Slug PhoenixPerfect Jupiter KingAvatar of EvilInvader KingCelestial Ruler Rokker
Books Metal Slug Attack Official Artbook
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 O'Neil
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 Worm MechaCrablopsDestroyed CrablopsFall MechaThe UnionRebel GigantKraken
Mini-Bosses: Scrap TowerBig Gate
Metal Slug: 1st Mission Rebel VTOLRebel TrainMacbaRebel ZeppelinElectromagnetic CraneWeapons Port BossHilde Garn
Mini-Bosses: Facility ElevatorMacbaRebel Truck
Metal Slug: 2nd Mission Big BerthaTerrain CarrierRebel ReactorMacbaRebel SubmarineTani OhWiredRebel AirplaneHilde Garn's SlugRocket UFO
Mini-Bosses: Power GeneratorsRebel RocketHyakutaro
Metal Slug Advance FormorEmain MachaKaladgolgThe Keesi IIICabracan
Mini-Bosses: Allen Jr.
Metal Slug 3D ParachuetruckMosque ArtillerySpider-BotUnderground Cruise MissileMorden's BattleshipMorden's CastleAllen O'NeilLugusLieu
Metal Slug Attack Pharaoh's ArcPtolemaiosBall SlugGreat MotherMars GigantalosK-O3 Coupled Armored VehicleLand BlowfishCyclobsterSlug SquareZoni DolomaQuadro JumperDenturionD-GuFortmeranianRock MoleGiant CopterEt A OmnisVortexDigger BaseCrusty LegsArmored CrawlerQueen Big Snail7000 Class LocomotiveRiviere HyllMetal Fusioner No.223Drum SlugMars WolfSea DragonTetsujin Squad
Mobile games Rocket Control RoomUnknown AlienHellfireSpiderbotCyclopsMega Laser TurretMars Battle UFOM-32 Water Carrier PlaneKouraiAlien Floating Structure