| title | developer | year | platform | | pop. |
|---|
| UFO: Afterlight | ALTAR Games | 2007 | Windows | strategy role-play Science Fiction | image | subject | label | |
| UFO: Aftermath | ALTAR Interactive | 2003 | Windows | strategy Science Fiction | image | subject | label | |
| UFO: Aftershock | ALTAR Interactive | 2005 | Windows | strategy Science Fiction | image | subject | label | |
| Ultima | Sigma Micro Systems | 1983 | Atari 400/800 | role-play Fantasy | image | subject | label | |
| Ultima | California Pacific Computer | 1981 | Apple II E | role-play Fantasy | image | subject | label | |
| Ultima I: The First Age of Darknes | Pony Canyon | 1989 | MSX2 | role-play Fantasy | image | | label | |
| Ultima I: The First Age of Darkness | Origin | 1986 | C64 | role-play Fantasy | image | subject | label | |
| Ultima I: The First Age of Darkness | The Software Gremlins | 1994 | Apple IIGS | role-play turn-based Fantasy | image | subject | label | |
| Ultima I: The First Age of Darkness | Newtopia Planning | 1988 | NEC PC8801 | role-play Fantasy | image | | label | |
| Ultima II: Revenge of the Enchantress | Sierra On-Line | 1985 | Mac OS Classic | role-play Fantasy | image | | label | |
| Ultima II: Revenge of the Enchantress | Sierra On-Line | 1982 | Apple II E | role-play Fantasy | image | subject | label | |
| Ultima III: Exodus | Newtopia Planning | 1988 | MSX2 | role-play Fantasy | image | | label | |
| Ultima IV: Quest of the Avatar | Origin | 1985 | C64 | role-play Fantasy | image | | label | |
| Ultima IV: Quest of the Avatar | Origin | 1988 | Amiga | role-play Fantasy | image | | label | |
| Ultima IV: Quest of the Avatar | Origin | 1986 | Atari 400/800 | role-play Fantasy | image | | label | |
| Ultima IV: Quest of the Avatar | Origin | 1988 | Atari ST | role-play Fantasy | image | | label | |
| Ultima IV: Quest of the Avatar | Pony Canyon | 1987 | Sharp X1 | role-play Fantasy | image | | label | |
| Ultima IV: Quest of the Avatar | ? | 1997 | Apple IIGS | role-play Fantasy | | | label | |
| Ultima IV: Quest of the Avatar | Newtopia Planning | 1987 | NEC PC9801 | role-play Fantasy | image | | label | |
| Ultima IV: Quest of the Avatar | Pony Canyon | 1988 | X68000 | role-play Fantasy | | | label | |
| Ultima IV: Quest of the Avatar | Origin | 1992 | FM Towns | role-play Fantasy | image | | label | |
| Ultima IV: Quest of the Avatar | Origin Systems | 1985 | MS-DOS | role-play Fantasy | image | subject | label | |
| Ultima IV: Quest of the Avatar | Pony Canyon | 1987 | NEC PC8801 | role-play Fantasy | image | | label | |
| Ultima IV: Quest of the Avatar | Origin | 1990 | Master System | role-play Fantasy | image | subject | label | |
| Ultima IV: Quest of the Avatar | Origin | 1987 | MICRO 7 - FM7 | role-play Fantasy | | | label | |
| Ultima IV: Quest of the Avatar | Origin | 1985 | Apple II E | role-play Fantasy | image | subject | label | |
| Ultima IX: Ascension | Origin | 1999 | Windows | action/reflex role-play Fantasy | image | subject | label | |
| Ultima Underworld II: Labyrinth of Worlds | Looking Glass Technologies | 1993 | MS-DOS | role-play Fantasy | image | | label | |
| Ultima Underworld II: Labyrinth of Worlds | Looking Glass Technologies | 2012 | Mac OS X | role-play Fantasy | | | label | |
| Ultima Underworld: The Stygian Abyss | Blue Sky Productions | 1992 | MS-DOS | role-play Fantasy | image | subject | label | |
| Ultima Underworld: The Stygian Abyss | Blue Sky Productions | 2012 | Mac OS X | role-play Fantasy | | | label | |
| Ultima V: Warriors of Destiny | Infinity Co. | 1990 | X68000 | role-play Fantasy | image | | label | |
| Ultima V: Warriors of Destiny | Origin | 1988 | C64 | role-play Fantasy | image | | label | |
| Ultima V: Warriors of Destiny | Imagitec Design | 1990 | Amiga | role-play Fantasy | image | | label | |
| Ultima V: Warriors of Destiny | Binary Vision | 1989 | Atari ST | role-play Fantasy | image | | label | |
| Ultima V: Warriors of Destiny | Origin | 1988 | MS-DOS | role-play Fantasy | image | | label | |
| Ultima V: Warriors of Destiny | Origin | 1987 | Apple II E | role-play Fantasy | image | subject | label | |
| Ultima V: Warriors of Destiny | Origin Systems | 1988 | C128 | role-play Fantasy | | | label | |
| Ultima V: Warriors of Destiny | Infinity Co. | 1990 | NEC PC9801 | role-play Fantasy | image | | label | |
| Ultima V: Warriors of Destiny | Pony Canyon | 1990 | NEC PC8801 | role-play Fantasy | | | label | |
| Ultima V: Warriors of Destiny | Fujitsu | 1992 | FM Towns | role-play Fantasy | image | | label | |
| Ultima VII: The Black Gate | Origin | 1992 | MS-DOS | role-play Fantasy | image | subject | label | |
| Ultima VIII: Pagan | Origin | 1994 | MS-DOS | adventure role-play Fantasy | image | | label | |
| Ultima: Exodus | Origin | 1987 | NES | role-play Fantasy | image | subject | label | |
| Ultima: Quest of the Avatar | Infinity;Atelier Double | 1989 | NES | role-play Fantasy | image | subject | label | |
| Ultima: Warriors of Destiny | Origin Systems | 1992 | NES | role-play Fantasy | image | | label | |
| UMoria | author | 1983 | Unix | role-play Fantasy | | | label | |
| UMoria | author | 1993 | Tandy Coco | role-play Fantasy | | | label | |
| Uncanny Valley | Cowardly Creations | 2015 | Windows | action/reflex adventure Horror | image | | label | |
| Underrail | Stygian Software | 2015 | Windows | role-play turn-based | image | subject | label | |
| Underworld Adventures | ? | 2005 | BeOS | role-play Fantasy | | | label | |
| UnEpic | author | 2011 | Windows | action/reflex platformer role-play Fantasy | image | subject | label | |
| UnEpic | author | 2014 | Linux | action/reflex platformer role-play Fantasy | | | label | |
| UnEpic | author | 2014 | Mac OS X | action/reflex platformer role-play Fantasy | | | label | |
| Uninvited | Icom Simulations | 1987 | Atari ST | adventure Horror | image | | label | |
| Uninvited | Icom Simulations | 1988 | Apple IIGS | adventure Horror | image | | label | |
| Uninvited | Icom Simulations | 1987 | Amiga | adventure Horror | image | | label | |
| Uninvited | Icom Simulations | 1986 | Mac OS Classic | adventure Horror | image | | label | |
| Uninvited | Icom Simulations;Mindscape | 1987 | C64 | adventure Horror | image | | label | |
| Uninvited | Icom Simulations | 1987 | MS-DOS | adventure Horror | image | | label | |
| Uninvited | ICOM Simulations | 1989 | NES | adventure Horror | image | subject | label | |
| Unnamed | Songbird Productions | 2021 | Lynx | adventure | | | label | |
| UnNetHack | author | 2011 | Linux | role-play Fantasy | image | subject | label | |
| Unreal | Epic MegaGames;Digital Extremes | 1998 | Windows | shooter Science Fiction | image | | label | |
| Unreal | Westlake Interactive;Epic MegaGames;Digital Extremes | 1999 | Mac OS Classic | shooter Science Fiction | | | label | |
| Untitled RPG | author | 2000 | Linux | role-play turn-based Fantasy | | | label | |
| Urban Dead | - | 2005 | Internet Only | | image | | label | |
| Utopia | Unicorn Software | 1985 | Mac OS Classic | adventure Science Fiction | | | label | |
