Alien
Yu-Gi-Oh! archetype · 40 cards
"A" Cell Breeding DeviceFOTB-EN043 · Force of the Breaker
"A" Cell IncubatorGLAS-EN062 · Gladiator's Assault
"A" Cell Recombination DeviceINOV-EN063 · Invasion: Vengeance
"A" Cell Scatter BurstSTON-EN041 · Strike of Neos
Alien AmmoniteCRMS-EN039 · Crimson Crisis · +1 printing
Alien BrainABPF-EN075 · Absolute Powerforce · +4 printings
Alien DogRGBT-EN033 · Raging Battle
Alien GreyPOTD-EN024 · Power of the Duelist
Alien HunterPOTD-EN026 · Power of the Duelist
Alien HypnoGLAS-EN035 · Gladiator's Assault
Alien InfiltratorCDIP-EN033 · Cyberdark Impact
Alien KidCRMS-EN084 · Crimson Crisis
Alien MarsCDIP-EN034 · Cyberdark Impact
Alien MotherPOTD-EN028 · Power of the Duelist · +2 printings
Alien OverlordCRMS-EN038 · Crimson Crisis
Alien PsychicSTON-EN031 · Strike of Neos
Alien ShocktrooperTAEV-EN001 · Tactical Evolution
Alien Shocktrooper M-FrameDUOV-EN003 · Duel Overload
Alien SkullPOTD-EN025 · Power of the Duelist
Alien StealthbusterDAMA-EN021 · Dawn of Majesty
Alien TelepathGLAS-EN034 · Gladiator's Assault
Alien WarriorPOTD-EN027 · Power of the Duelist · +2 printings
Brainwashing BeamPOTD-EN060 · Power of the Duelist
Cell Explosion VirusGLAS-EN076 · Gladiator's Assault · +1 printing
Code A Ancient RuinsCRMS-EN088 · Crimson Crisis
Corruption Cell "A"CDIP-EN037 · Cyberdark Impact
Cosmic Fortress Gol'garCRMS-EN044 · Crimson Crisis · +1 printing
Cosmic Horror Gangi'elPOTD-EN029 · Power of the Duelist · +1 printing
Cosmic Slicer Zer'ollDAMA-EN047 · Dawn of Majesty
Crop CirclesPOTD-EN051 · Power of the Duelist
Detonator Circle "A"GLAS-EN077 · Gladiator's Assault
Flying Saucer Muusik'iPOTD-EN030 · Power of the Duelist
I.A.S. -Invasive Alien Species-AGOV-EN023 · Age of Overlord · +1 printing
Interdimensional WarpGLAS-EN078 · Gladiator's Assault
Interplanetary Invader "A"LODT-EN034 · Light of Destruction
Mass HypnosisFOTB-EN058 · Force of the Breaker
Mysterious TriangleCRMS-EN062 · Crimson Crisis
Orbital BombardmentPOTD-EN053 · Power of the Duelist
Otherworld - The "A" ZoneFOTB-EN044 · Force of the Breaker
Planet Pollutant VirusCRMS-EN080 · Crimson Crisis · +1 printing
Archetypes from YGOPRODeck and YAML Yugi (Yugipedia).