Sega Ages 2500 Series Vol. 4 - Space Harrier is a shoot'em up developed by Tamsoft and published by Sega. It was released in its own in Japan only, in North America, Europe and Australia it was only released as a part of the Sega Classics Collection.

The game is a remake of the original Space Harrier, using 3D graphics instead of scaled sprites. The game itself also got some changes. Now you have a limited number of bombs which destroy everything on screen, and you can collect new ones in the levels. You can also collect single homing shots or a protective shield, and the game now also has a rapid fire button. The game also features two new underground passages.