Planet 51: The Game is an action & adventure game that can be described as Grand Theft Auto for kids. It is based on the animated movie with the same name. You will play as Lem (the young green alien), Charles 'Chuck' Baker (the stranded astronaut) or R.O.V.E.R. (the mechanical probe), in their joint effort to help the astronaut in getting back to the Earth .
The game has three acts, divided in 40 missions. You'll have to race, crash cars, escape from villains, find hidden rocks, transport goods, mow lawns, etc. Throughout the course of the game, you can unlock rewards and gain achievements by completing missions in a set amount of time or without breaking the car, finding all the secret comic pages, performing jumps through billboards, etc.