"Crash Twinsanity" was developed by Traveller's Tales' Oxford division and published by VU Games under its Sierra Entertainment brand. The game was originally titled "Crash Bandicoot Evolution" and featured a premise involving the Evil Twins stealing Crash's island from Earth and grafting it onto a giant planet made from pieces of others. The tone of the game was intended to be more serious than preceding entries in the series, with the term "edgy" being widely used among the development team. In response to the release of Insomniac Games' "Ratchet & Clank", which featured an identical premise, Traveller's Tales abandoned "Crash Bandicoot Evolution" and restarted production with a focus on making the next "Crash" title as comedic as possible. The new game went through several working subtitles, including "Unlimited", "Fully Fluxed" and "Twinsane". Eventually, VU Games gave Traveller's Tales one hour to choose the final title before the default selection of "Unlimited". Concept artist Keith Webb came up with the title "Crash Twinsanity" with only five minutes to spare. The game was announced as "Crash Bandicoot: Unlimited" on March 26, 2004, with "Crash Twinsanity" originally intended as the game's American title.