Gamers can take on two Sega Master System titles and updated 3D versions of seven retro games in Sega 3D Classics Collections. Players can shoot their way through Galaxy Force II, updated and original versions of Fantasy Zone II, and the stereoscopic helicopter gunner Thunder Blade; speed around 25 courses in Power Drift; battle mythological creatures in Altered Beast; match colored blobs in Puyo Puyo 2; explore top-down labyrinths in Maze Walker; and take on the classic side-scroller Sonic the Hedgehog. Puyo Puyo 2 and Altered Beast support two players.