Jimmy Neutron: Boy Genius is 3D game based on the movie of the same name. The game starts with an alien fleet approaching earth seeking to capture Jimmy Neutron. While trying to capture Jimmy, Carl is accidently beamed aboard the alien ship. Jimmy now has to free Carl and other captives from the alien threat.
In the game the player takes control of Jimmy Neutron and has to travel through six levels by completing missions to gather inventions and help defeat the aliens. Collected points (for a higher score) by completing objectives, finding hidden areas and unlocking new inventions. Whenever you find a new invention, you can enter a practice mode to try out the new invention. Such inventions include: a rocket ship to fly around town, a shrink ray to shrink your enemies and a scooter that is used with your pet dog invention Goddard to ride him to move around a lot faster.