Wikipedia: 1991 in video gaming - MobyGames: Browse 1991 - The International Arcade Museum: 1991
Amnios
Amiga 1991@725
Another World
Amiga 1991@73
Crisis Force
NES 1991@1363
Eye of the Beholder
DOS 1991@1154
Fatal Fury: King of Fighters
Neo Geo, November 1991@336
Golden Axe II
SEGA Genesis 1991@2856
Master of Monsters
SEGA Genesis, October 1991@3371
Monkey Island 2: LeChuck's Revenge
Amiga 1991@77
Moonstone
Amiga 1991@96
Riot City
System 16 1991@3406
Rod-Land
Amiga 1991@926
Street Fighter II: The World Warrior
CP System, February 1991@111
Super Castlevania IV
SNES 1991@214
Super R-Type
SNES 1991@231
The Simpsons
Arcade 1991@2426
Turrican II: The Final Fight
Amiga 1991@72
Vimana
Arcade 1991@1779
Warrior Blade: Rastan Saga Episode III
Arcade 1991@1889
WWF WrestleMania
Amiga 1991@966