Wicked Twins from another dimension invade Crash's island home, to steal all the Wumpa fruit, the fuel source for the Twins' technology.   To face a greater evil, Crash Bandicoot must team up with his creator and arch rival, Dr. Neo Cortex.   Crash Bandicoot Twinsanity introduces an insanely humorous twist to platform gaming with the introduction of a two-character game mechanic. Players control Crash and Dr. Cortex as a single playable entity.