Duke Nukem II (Episode 4) | 1993 | Apogee Softwawre (Adventure)
This is the fourth episode in the Duke Nukem series, and it is quite a treat. By that, I mean that it's free (er, shareware rather). As with keen, the sequel has slightly new gameplay.
Shareware Version (1.09MB)
  • Official Site - Screenshots, Release Info, System Requirements