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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. He can also fire 4 beams; 2 from the front, 2 diagonally from the back.

Gallery

Trivia

See also

Gradius II
Ships Vic Viper
Stages (Arcade) Artificial SunAlienCrystalVolcanoRevenge of MoaiHigh Speed ZoneBoss RushGofer Ship Interior
Port-Exclusive Stages Volcano - Crystal (NES) • Enemy Base (NES) • Gofer's Lair (NES) • Temple (PC-E)
Bosses PhoenixBig EyeGiga (NES) • Crystal CoreDeath MK IIJumping MoaiBig MoaiDesert Core (PC Engine) • Big Core MK IIZub RushBig CoreTetranGawIntruderZelos Force (NES) • Covered CoreDemosCrabGofer
Gradius III
Ships Vic Viper
Stages DesertBubble ZoneVolcanic PlanetHigh Speed DimensionMoai ZoneCell PlanetProminence PlanetPlant PlanetCrystal ZoneBoss RushMechanical Base
SNES Exclusive Stages High Speed ZoneFortressCell
Bosses GoliathBubble EyeGodreiBig Core MK IIIDogasVaifTwin Vaif (SNES) • GregolWyvernVulture DragonChoking WeedLizard CoreBeacon (SNES) • TetranCovered CoreBig Core MK IICrystal CoreDeath MK IIDellinger CoreDisruptShadow GearShadow Gear MK II (SNES) • Big CoreBrain GolemBacterion
Gradius V
Ships Vic Viper T-301
Stages Planet Gradius Satellite OrbitPlanet Gradius City Sky APlanet Gradius Urban Underground HierarchyBacterian Cell CenterAsteroid Front BaseBacterian Multiplication PlantBacterian Fortification CenterPlanet Gradius City Sky B
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 and Thrasher (Iggy Rock and Zowie Scott) • Super CobraGalaxyPurple EmperorRed Devil
Salamander stages Bionic GermMeteorite SpaceBurning ChaosVolcano 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 Sub-life SpaceProminence FortressBio HazardHuge BattleshipAsteroidDoom Fortress
Salamander bosses Brain GolemTetranIntruderFortress ValisDeathBig Core X3Jumping MoaiZelos Force
Port exclusive bosses ZylomGawGigaTutankhamonDead 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 PlanetSinAsteroid BeltWater PlanetVenom Mothership
Nemesis 3 stages SunPlantGravityPast-BossMoaiHellSandCellFactoryGofer Ship
Nemesis 2 bosses SoddRiot WarshipMisfit WarshipBig Core X10Mayhem WarshipDoomSinarAbaddon WarshipVenom
Nemesis '90 Kai exclusive bosses Lizard CoreLaser CoreBig Core MK II KaiBeta Core
Nemesis 3 bosses Geezer ButlerHans NaughtyTetranAbaddon WarshipMisfit WarshipBig CoreArmored SaintLynyrd SkynyrdTriumph KicksKiller DwarfCrab WarlockQueensrÿcheGofer
Otomedius
Main Characters Aoba AnoaErul TronEmon-5MadokaDiol TweeTita NiumEsmeraldaPoini CoonArnvalStrarfGesshi HanafuumaKokoro Belmont
Supporting Characters OperettaPrincess IreneKonami LadyEmon-8Pastel
Antagonists ElizaTiti XIVYoshikoGofer SistersMeta LiumNeko SenchoT.B. RikaRyukotsukiShiori FujisakiRuby and CobaltDark Force
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 CoreAbaddon WarshipMayhem WarshipTetranViva CoreManbowBig 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 BringerScramble ShipBisumaru 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 CoreLaser CoreLizard CoreNeo Big CorePerla MeraldaRexion CoreRolling CoreShining CoreSuper Big CoreTerra CoreVanishing CoreViva CoreGenocide CoreOdin Core
Core-style bosses Abaddon WarshipBubble EyeCovered CoreCovered Core MK IIDead EndKrakenMayhem WarshipMetal SlaveMisfit WarshipQueensrÿcheRiot WarshipPlate Core
Pseudo-Cores DeathDeath MK II (DeathDouble) • Death MK IIIBeta CoreNobilTriple CoreCrash Bam
Tetran variants Tetran (Zylom) • Covered TetranCrystal Core D-X02Laser TetranTenny Rop