Chibi-Robo! puts the player in control of a tiny battery-powered robot that does housework for humans, in this case the Sandersons. It takes place in a 1960s-style home. The objective of the game is to become the number one Chibi-Robo by accumulating Happy Points, a collectible that is gained by doing good deeds for the family and for various toys in the Sandersons' house.