One Turn Kill

A One Turn Kill is achieved when a player wins a duel in the space of a single turn, as soon as said player has the appropriate cards in hand and has control over the duel. The One Turn Kill is similar to a First Turn Kill, but the latter is pulled off during the player's first turn, while an OTK can be accomplished at any point of the duel (meaning that FTKs are all OTKs, but not all OTKs are FTKs).

The first prerequisite of an OTK, is that it must be capable of winning in one turn, meaning you can either deplete all of your opponent's 8000 Life Points or fulfill a victory condition in one turn.

The second prerequisite of an OTKs is that it must consist of 4 or fewer cards; the listed cards cannot include cards on your opponent's side of the field, and cannot include cards that relate to chance (Such as "Arcana Force" monsters). All of the cards of the OTK must have a reasonable chance of being drawn early, to be able to take control of the duel and win before being overwhelmed.

The third prerequisite of an OTK is Format. Both Traditional and Advanced Formats will have very different OTK styles, owing to the allowable card pools.

Traditional Format-compliant
Here are some One Turn Kills:
 * Athena OTK
 * Ancient Gear Golem OTK
 * Batteryman OTK
 * Ben Kei Deck
 * Black Ptera OTK
 * Butterfly Dagger - Elma OTK (Traditional only)
 * Cactus Fighter OTK
 * Chaos Emperor Dragon OTK (Traditional only)
 * Chimeratech OTK
 * Colossal Fighter OTK
 * Cyber End/Metamorphosis OTK (Traditional only)
 * Cyber Twin OTK (Unusable unless decks do not follow official gameplay Limited lists)
 * Cyber-Stein OTK (Traditional only)
 * Dark Magician of Chaos OTK (Traditional only)
 * Dark Reborn OTK (Traditional only)
 * Demise OTK
 * Des Frog OTK
 * Diffusion Wave-Motion OTK
 * Evil Hero Dark Gaia OTK
 * Exodia OTK
 * Gear Golem OTK
 * Judgment Dragon OTK (Traditional only)
 * Lava Golem OTK (Traditional only)
 * Magical Scientist OTK (Traditional only)
 * Maji-Gire OTK (Traditional only)
 * Necromill OTK
 * Quillbolt Hedgehog OTK
 * Rescue Cat OTK (Traditional only)
 * New Rescue Cat OTK
 * Ultimate Tyranno OTK