So far, one of the best puzzle games out there for the PSP, Lumines is a Tetris-like game. Groups of four blocks in the shape of squares (called 'Quads') fall from the top of the screen down to the bottom. The point is to get squares of like colours matching to clear them, and to try and get highscores. Graphics and music are a big part of the game. Lumines is only available for the PSP.