Inspired by Surfy's thread! Early ones: Quake, Starsiege Tribes, Return Fire! and Return Fire! 2, Swiv3d, Carmageddon, Mechwarrior 2 Mercenaries, Incoming, Ultim@te Race Pro, Moto Racer. Also a demo for what should have been the most kick@ss RTS at the time, but devs wouldn't take the publishing deal they were offered: FIRE AND DARKNESS Later ones: Quake II & III, Unreal, Mechwarrior 3. Return to Castle Wolfenstein, ReVolt, OPERATION FLASHPOINT (Arma is still my #1), Oni, Forsaken. Probably many more that don't immediately leap to mind! I probably blurred the line between early and late a little bit, but eh, it's a long time ago now.
Carmageddon (Dos) Carmageddon II: Carpocalypse Now Croc: Legend of the Gobbos Grand Theft Auto 2 Homeworld Need for Speed III: Hot Pursuit Need for Speed: High Stakes Need for Speed: Porsche Unleashed Return to Castle Wolfenstein Shadow Warrior (1997) Star Wars: X-Wing vs. TIE Fighter Uprising 1 and 2
Quake II & III Driver Pandemonium! Return to Castle Wolfenstein Half-Life Colin McRae Rally Screamer 4x4 NFS High Stakes & Porsche and many many more
Mechwarrior 3 but especially UT99... I remember there was the UT crowd which was the new kid on the block and the Quake 3 crowd. I was so wowed at the PC shop by UT99 running on the massive voodoo card, 640x480 woahhhhh.