Sega Ages 2500 Series Vol. 4: Space Harrier is a remake of the original 1985 arcade release of Space Harrier, namely one which replaces the scaled 2D sprites with 3D textured models. It tweaks some of the levels, remixes the music and adds a lock-on feature similar to Panzer Dragoon, but is otherwise mostly the same game. "Fractal" mode removes the checkerboard floors and replaces them with more realistic scenery.