One of Earthworm Jim's enemies from the animated television series, Evil Jim, has returned to cause chaos in the Galaxy. Our hero's evil doppelganger has stolen a doomsday device, the Inter-Dimensional Transporter-of-Doom, which he plans to sell to the highest bidder. Earthworm Jim has to search numerous worlds for the doomsday device and recover it from his evil twin, on a new quest that will bring him face-to-face with many of his oldest foes.

One of Earthworm Jim's enemies from the animated television series, Evil Jim, has returned to cause chaos in the Galaxy. Our hero's evil doppelganger has stolen a doomsday device, the Inter-Dimensional Transporter-of-Doom, which he plans to sell to the highest bidder. Earthworm Jim has to search numerous worlds for the doomsday device and recover it from his evil twin, on a new quest that will bring him face-to-face with many of his oldest foes.