Pick one, this whole list is made of classics:
Ace Combat (ARC; 1992)
Age of Empires (PC; 1997)
Asheron's Call (PC; 1999)
Baldur's Gate (PC; 1998)
Banjo-Kazooie (N64; 1998)
Battletoads (ARC; 1991)
Civilization (PC; 1991)
Command & Conquer (PC; 1995)
Crash Bandicoot (PS1; 1996)
Chrono Cross (PS1; 1999)
Cruis'n (ARC; 1994)
Diablo (PC; 1996)
Donkey Kong Country (SNES; 1994)2
DOOM (PC; 1993)
Duke Nukem (PC; 1991)
Dungeon Keeper (PC; 1997)
Earthworm Jim (SGA; 1994)
The Elder Scrolls (PC; 1994)
EverQuest (PC; 1999)
Fallout (PC; 1997)
Fire Emblem (Famicom; 1990)
F-Zero (SNES; 1990)
Gabriel Knight (PC; 1993)
Gran Turismo (PS1; 1997)
Grand Theft Auto (PC; 1997)
Half-Life (PC; 1998)
Harvest Moon (SNES; 1996)
Heroes of Might and Magic (PC; 1995)
Jurassic Park (MUL; 1993)1
Kirby (GB; 1992)
Mario Kart (SNES; 1992)2
Mario Party (N64; 1998)2
Medal of Honor (PS1; 1999)
Monkey Island (PC; 1990)
Mortal Kombat (ARC; 1992)
Myst (PC; 1993)
NBA Jam (ARC; 1993)
Need for Speed (3DO; 1994)
Neverwinter Nights (PC; 1991)
OddWorld (PC; 1997)
Pajama Sam (PC; 1996)
Parasite Eve (PS1; 1998)
Pokémon (GB; 1996)
Postal (PC; 1997)
Quake (PC; 1996)
Rayman (SGA; 1995)
Resident Evil (PS1; 1996)
Ridge Racer (ARC; 1993)
Rollercoaster Tycoon (PC; 1999)
Silent Hill (PS1; 1999)
Sonic The Hedgehog (SGA; 1991)
Soulcalibur (ARC; 1998)
Spec Ops (PC; 1998)
Spyro, The Dragon (PS1; 1998)
Starcraft (PC; 1998)
Star Fox (SNES; 1993)
Star Ocean (SNES; 1996)
Star Wars: Rogue Squadron (N64; 1998)
Streets of Rage (SGA; 1991)
Super Smash Bros. (N64; 1999)
Syphon Filter (PS1; 1999)
System Shock (PC; 1994)
Tales of Phantasia (SNES; 1995)
Tekken (ARC; 1994)
Thief (PC; 1998)
Time Crisis (ARC; 1995)
Tom Clancy's Rainbow Six (PC; 1998)
Tomb Raider (PC; 1996)
Tony Hawk's Pro Skater(PS1; 1999)
Turok (N64; 1997)
Twisted Metal (PS1; 1995)
Ultima Online (PC; 1997)
Unreal (PC; 1998)
Warcraft (PC; 1994)
Wing Commander (PC; 1990)
WipEout (PS1; 1995)
Worms (PC; 1995)