I spent hours and hours on this on my Apple IIe. They later came out with Commodore64 and Atari versions, but afaik, never DOS nor Windows. It has a little Wikipedia article, so look there for details, including praise in articles of the time. Realize this is very primitive, and made during the 1983 American videogame drought. So my rating is reflective of it's era. It's rather slow, back-forth, up-down, shooting at little bouncing figures and dodging knives. The sound effects are very primitive arcade-type noises, but considering the poor quality of sound system on an Apple, it was an outstanding effort. There's a little miniature display that just shows static, it's there for decoration, and hard to appreciate if you've not seen the usual blocky graphics of 80s microcomputers that often had just 64kb memory!