(This game was a clone of breakout I think.) It was the first pc game I played, ever! There was also a space shooter type of game, I loved that too, but I cannot remember its name. The graphics in that game consisted of crude bitmaps and colored rectangles!!
Contra, Mario 3, Super Contra
C&C , Wolfenstien 3D, Descent 2 , Battle Arena Toshinden
Descent 2 -> I really, really hated those thief robots! So much that I would waste a lot of ammo trying to take em down!