Ratchet: Deadlocked (known as Ratchet: Gladiator in Europe, Australia and Africa, and Ratchet & Clank 4 in Japan) is a 2005 action platformer in the Ratchet & Clank series, developed by Insomniac Games and published by Sony Computer Entertainment for the PlayStation 2. The game's story begins as Ratchet, Clank, and Al are abducted and forced to compete in "DreadZone", a violent game show in which heroes are forced to kill each other.