Art Game-Psychonauts

Psychonauts is a very excellent game.

"Psychonauts is based on the exploits of Raz, a young boy gifted with psychic abilities who runs away from the circus to try to sneak into a summer camp for those with similar powers in order to become a "Psychonaut". He finds that there is a sinister plot occurring at the camp that only he can stop. The game is centered on the widely strange and imaginative minds of various characters that Raz enters as a Psychonaut-in-training/"Psycadet" in order to help them overcome their fears or memories of their past, so as to gain their help and progress in the game. Raz gains use of several psychic abilities during the game that are used for both attacking foes and solving puzzles."--wiki

One artists I know from this game is Jacek Yerka