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Tetran

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Tetran is a staple boss of the Gradius franchise, first appearing in the spin-off Salamander as the second boss and making regular appearances since. Most, if not all, Tetran encounters usually plays an arrangement of Poison of Snake.

Attack Patterns

Tetran's main attack is firing bullets and spinning its four arms around in an attempt to destroy the player. Careful maneuvering is often necessary to dodge in the tight surroundings since the arms limit movement. The arms also protect the core as they spin and block the opening, making attack opportunities limited.

Tetran generally doesn't change its attack abilities too much between games, but later appearances increase its capabilities by adding extra weapons at the tips of the arms and making the arms themselves more unpredictable in their movements. Gradius V in particular features a significant new addition to the Tetran's arsenal by spinning its arms at incredible speeds while firing lasers rapidly, filling the entire area with enemy fire.

Gallery

Trivia

  • In Rocket Knight Adventures, the Pulsating Plasma Blaster miniboss appears as a combination of Tetran and Big Core.
  • A bio version of Tetran, called Zylon, appears in Life Force which is a different version of Salamander.

See Also:

Gradius II
Ships Vic Viper
Stages (Arcade) Burning HeatSynthetic LifeCrystal WorldA Way Out of the DifficultyThe Old Stone AgeDeprived Sanctity (PC-E exclusive)Maximum SpeedBoss RushInto Hostile Ship
Stages (NES) Stage 1Stage 2Stage 3Stage 4Stage 5Stage 6Stage 7Stage 8
Bosses PhoenixBig EyeGiga (NES) • Crystal CoreDeath MK IIJumping MoaiBig MoaiDesert Core (PC Engine) • Big Core MK IIZub RushBig CoreTetranGauIntruderZelos Force (NES) • Covered CoreDemosCrabGofer
Gradius III
Ships Vic Viper
Stages (Arcade) Stage 1Stage 2Stage 3Stage 4Stage 5Stage 6Stage 7Stage 8Stage 9Stage 10
Stages (SNES) Stage 1Stage 2Stage 3Stage 4Stage 5Stage 6Stage 7Stage 8Stage 9Stage 10
Bosses GoliathBubble EyeIron MaidenBig Core MK IIIDogasVaifTwin Vaif (SNES) • GregolWyvernVulture DragonChoking WeedLizard CoreBeacon (SNES) • Zub Rush MK IITetranCovered CoreBig Core MK IICrystal CoreDeath MK IIDellinger CoreDisruptShadow GearShadow Dancer (SNES) • Big CoreBrain GolemBacterion
Gradius V
Ships Vic Viper T-301
Stages (Arcade) Stage 1Stage 2Stage 3Stage 4Stage 5Stage 6Stage 7Stage 8
Bosses Big Core Rev. 1.2Venom (Lower) • Death MK IIITetranBig Core MK IIBig Core MK IVGround SpiderHuge HeartBlaster Cannon CoreRolling CoreCircle CoreBig Core MK IIICovered Core MK IIBeaconKeeper's CoreElephant GearVenom (Upper)
Salamander
Ships Vic ViperLord BritishSabel Tiger (Iggy Rock) • Thrasher (Zowie Scott) • Super Cobra
Salamander stages Bionic GermMeteorite SpaceRatisVolcano AreaSalamander Planetoid
Salamander (MSX) stages Top Flight Speed to LatisConduct to Space Station ZotSet the Crush Blow System - Planet EioneusSet the Crush Blow System - Planet LaviniaSet the Crush Blow System - Planet KierkeWrath of VenomCrush Salamander
Life Force-only stages Organic Speed ZoneTemple Zone
Salamander 2 stages Organic SkyArtificial SunsResident EvilBattleship ArmadaRuins of Final BaseCrystal AsteroidsDoom Fortress
Salamander bosses Brain GolemTetranIntruderCenter CoreDeathBig Core X3Jumping MoaiZelos Force
Port exclusive bosses ZylomGauInvaderGigaTutanhamanattackDead EndEnigmaTrue VenomMetal SlaveZelos Barrier
Salamander 2 bosses BiterHydraAbadonTenny RopPlate CoreCerberusDoom
Nemesis
Characters James Burton (Metalion) • David Burton (Vixen) • GaudieVenomVenom's Aides
Nemesis 2 stages Colossus PlanetPlant PlanetAncient PlanetFloating ContinentsPlanet of FireLiving PlanetSinVenom Mothership
Nemesis 3 stages Stage 1Stage 2Stage 3Stage 4Stage 5Stage 6Stage 7Stage 8Stage 9Stage 10Stage 11
Nemesis 2 bosses Statue GuardiansRiot WarshipMisfit WarshipAsteroid FieldBig Core X10Prominence ZoneMayhem WarshipBiological OrganismBlock CoreAbandon WarshipVenom
Nemesis '90 Kai exclusive bosses Lizard CoreLASER CoreBig Core MK II KaiBeta Core
Nemesis 3 bosses Geezer ButlerHans NaughtyWormhole AreaTetranAbandon WarshipMisfit WarshipBig CoreArmored SaintLynyrd SkynyrdTriumph KicksKiller DwarfCrab WarlockFront of Gofer's Warship (Queensrÿche)Gofer's Warship (Queensrÿche)
Otomedius
Main Characters Aoba AnoaErul TronEmon-5MadokaDiol TweeTita NiumOperettaEsmeraldaPoini CoonArnvalStrarfGesshi HanafuumaKokoro Belmont
Antagonists ElizaTiti XIVYoshikoPrincess IreneGofer SistersMeta LiumNeko SenchoT.B. RikaRyukotsukiShiori FujisakiRuby and CobaltDark ForceKonami LadyEmon-8Pastel
Otomedius / Gorgeous stages San Salvador IslandTokyoCanadian RockiesEaster IslandAlexandriaAntarcticaValhalla
Otomedius X: Excellent! stages The Big WaveMidnight TetranSpelunker of HellThe Ancient BacterianThe Return of Cosmic WarDark Force's Ambition Part 1Dark Force's Ambition Part 2Dark Force's Ambition Part 3Skills to the TestMessage from Emon-5The Reunion
Otomedius / Gorgeous bosses Eliza's Pet SealEyegolBig Core DX-01Scrab CoreCrystal Core D-X02Big CoreAbandon WarshipMayhem WarshipTetranViva CoreSpace ManbowBig Core MK IIRolling CoreCovered Core MK IIDeathZelos Force FortuneOdin Core
Otomedius X: Excellent! bosses Mirrored CoreTri-Pod CoreSerpent-CoreBig Core DXOld Big CoreHeaven's GatePerla MeraldaNeo Big CoreMisfit WarshipDellinger CoreMetal SlaveGunner WallBlack ViperDeath BringerScrumbleBisumaru ExcellentWinbee
Core Warships
Big Cores Big Core MK IBig Core Rev. 1.2Big Core MK IIBig Core MK II KaiBig Core MK IIIBig Core MK IV
Big Core variants BeaconBlaster Cannon CoreBubble CoreCircle CoreCoreshipCrater CoreCrystal CoreDellinger CoreDesert CoreHeaven's GateJuggler CoreLizard CoreNeo Big CorePerla MeraldaRexion CoreRolling CoreRotating LauncherShining CoreSuper Big CoreTerra CoreTriple Core (Life Force)Vanishing CoreViva CoreGenocide Core
Core-style bosses Abandon WarshipBubble EyeCovered CoreCovered Core MK IIDead EndKrakenMayhem WarshipMetal SlaveMisfit WarshipQueensrÿcheRiot WarshipPlate Core
Pseudo-Cores Death (Gau) • Death MK II (DeathDouble) • Death MK IIIBeta CoreNobilTriple Core
Tetran variants Tetran (Zylom) • Covered TetranCrystal Core D-X02Laser TetranTenny Rop

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