Space Ace 21

Space Ace 21 is a game where players construct modular spacecraft from a set of modules and test the design in simulated realistic physics based 3d or 2d stop action combat

Space Ace 21 is a game involving combat between two spaceships, played in either two or three dimensions.

Ian Chadwick reviewed Space Ace 21 in Ares Magazine #13 and commented that "Space Ace 21 is highly recommended for the science fiction game buff tired of arcade shootouts and looking for a more realistic bit of fun."