Earthworm Jim has been hit on the head by a flying cow. After lapsing into a coma, Jim awakens inside his own brain. Now he must collect the loose marbles and golden cow udders to return to the land of the living. Along the way, he must battle classic enemies like Evil the Cat and Professor Monkey for a Head, in addition to new enemies like Disco Zombies. Help Jim regain his marbles in EARTHWORM JIM 3D.