We liked these games so much, that we made some websites about them :)

Duke Nukem 3D	Come get some!
Interstate '76	Best videogame of the 90's
Jazz Jackrabbit 2	Think a green 2D rabbit can keep you busy?
Unreal Tournament	Second best FPS ever

Speaking of old school, Gravity Cat figured out how to use the Game Genie for the SNES on PAL systems (instead of NTSC, which gives a shitty picture and is American).
You can read all about it here.