Cube is one of the fun iPhone games you can get it download for free. It is a singleplayer and multiplayer first person shooter that gives you the satisfying and fast old school gameplay, yeah… reminds me of doom.
It is a landscape-style engine that pretends to be an indoor FPS engine, which combines very high precision dynamic occlusion culling with a form of geometric mipmapping on the whole world.
Video after the jump.