Psychonauts is a great game. I watched my roomie play it for hours. The idea is you're a gifted kid at a camp for telekinetic/psychic children. You learn about your abilities and collect lots of objects in a 3D platform RPG type game. Its kinda harry potter meets tomb raider in terms of game control mechanics, but the main objective is collecting objects, exploring the world, and solving puzzles. Its a good mix of brains and dexterity, and the graphics/level design is very creative. Its one of those games where its so amazingly cool, you don't understand why it wasn't bigger. Game designers and reviewers loved it, but I think it got overshadowed by bigger, more commercial releases at the time or something.