Blood II (1999)
Blood II: The Chosen is the successor to Blood, the 1997 Build Engine FPS hit, Blood II is an okay first person shooter with some weird bugs.
The box is pretty cool, though. This one that I have is complete.
Wolfenstein 3D (1992)
Behold, one of the first FPS computer games ever made! At least one of the first ones that were actually good. This is the first release of
the non-mail order variant of Wolfenstein 3D. Unfortunately, I am missing the original two floppy disks.
Grand Theft Auto (1997)
Despite being a hit mostly on consoles, the first Grand Theft Auto game was released originally on the PC. It aged poorly compared to Grand Theft
Auto 2, however, due to its crappy camera and overall laggy gameplay. This is the complete first[est] release of Grand Theft Auto. The later variants have more text on the box.
Syndicate was one of the best RTT (real time tactics) games that came out in 1993. Pretty addicting game, and the isometric mode view definitely adds in a lot of graphical depth to the game, something that MS-DOS games at the time lacked heavily in.