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. This 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 all FTKs are 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 Life Points (it's normally assumed to be 8000 exactly) or fulfill a victory condition in one turn.

The second prerequisite of an OTK is that it must consist of  maximum 6 or fewer cards; the listed cards cannot include cards on your opponent's side of the field and cannot include cards that relate to indefinite chance (Such as "Dangerous Machine Type-6"). 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.

Advanced Format OTKs

 * Armory Arm OTK
 * Asura Priest OTK
 * Athena OTK
 * Batteryman OTK
 * Ben-Kei OTK
 * Black Ptera OTK
 * Cactus Fighter OTK
 * Chimeratech OTK
 * Cold Terra OTK
 * Colossal Fighter OTK
 * Demise OTK
 * Des Frog OTK
 * Evil Hero Dark Gaia OTK
 * Exodia OTK
 * Gaurdian Eatos OTK
 * Gigaplant OTK
 * Gear Golem OTK
 * Honest OTK
 * Infernity OTK
 * Jinzo OTK
 * Magical Explosion FTK
 * Malefic Truth OTK
 * Necromill OTK
 * Ojama OTK
 * Quickdraw Synchron OTK
 * Quillbolt Hedgehog OTK
 * Spell Counter OTK
 * The Dark Ruler OTK
 * Trident Dragon OTK
 * Ultimate Tyranno OTK
 * Urgent Tuning Light Swarm OTK
 * Victory Viper OTK
 * Voltic OTK

Traditional Format Only OTKs

 * Butterfly Dagger - Elma OTK
 * Chaos Emperor Dragon OTK
 * Cyber End/Metamorphosis OTK
 * Cyber-Stein OTK
 * Dark Magician of Chaos OTK
 * Dark Reborn OTK
 * Dark Scorpion/Makyura OTK
 * Judgment Dragon OTK
 * Lava Golem OTK
 * Magical Scientist OTK
 * Manticore of Darkness OTK
 * Tuningware OTK