| UP906003 | Developer | |
| UPL | DeveloperPublisher | |
| UPL Co. | Developer | |
| UPL JP | Publisher | |
| UPlay Online | DeveloperPublisher | |
| UQAC2 | Developer | |
| US Billiards | Publisher | |
| US Gold | Publisher | |
| USC Games | Publisher | |
| USC Interactive Media Division | DeveloperPublisher | |
| USPGameDev | Developer | |
| USW Games | Developer | |
| UStriteTeam | Developer | |
| UTV Ignition Entertainment | DeveloperPublisher | |
| UTV Ignition Games | Publisher | |
| UU Soft | Developer | |
| UVST | Developer | |
| U_Games_Studio | Developer | |
| Uacari | Developer | |
| Uani Studio | DeveloperPublisher | |
| Ubarefeet | Developer | |
| Uber Entertainment | Developer | |
| UberPie | Developer | |
| UberWiggett | Developer | |
| Ubi Pictures | Developer | |
| Ubi Soft | DeveloperPublisher | |
| Ubi Soft (WW) | Publisher | |
| Ubi Soft Casablanca | Developer | |
| Ubi Soft EU | Publisher | |
| Ubi Soft Milan | Developer | |
| Ubi Soft Montpellier | Developer | |
| Ubi Soft Montreal | Developer | |
| Ubi Soft NA/EU | Publisher | |
| Ubi Soft Paris | Developer | |
| Ubi Soft Romania | Developer | |
| Ubi SoftNA/PAL | Publisher | |
| Ubi SoftPAL | Publisher | |
| Ubi Studios UK | Developer | |
| UbiSoft | Publisher | |
| UbicompBro | Developer | |
| Ubihard | Developer | |
| Ubiquitous Entertainment | Publisher | |
| Ubiquitous Mayonnaise | Developer | |
| Ubisoft | DeveloperPublisher | |
| Ubisoft (EU) | Publisher | |
| Ubisoft (NA/EU) | Publisher | |
| Ubisoft (PAL) | Developer | |
| Ubisoft Annecy | Developer | |
| Ubisoft Barcelona | Developer | |
| Ubisoft Bucharest | Developer | |
| Ubisoft Casablanca | Developer | |
| Ubisoft Chengdu | Developer | |
| Ubisoft EU | Publisher | |
| Ubisoft Entertainment | Publisher | |
| Ubisoft GmbH | Publisher | |
| Ubisoft Halifax | Developer | |
| Ubisoft Kyiv | Developer | |
| Ubisoft Milan | Developer | |
| Ubisoft Montpellier | Developer | |
| Ubisoft Montreal | Developer | |
| Ubisoft Munbai | Developer | |
| Ubisoft NA | Publisher | |
| Ubisoft NA/EU | Publisher | |
| Ubisoft Nagoya | Developer | |
| Ubisoft Osaka | Developer | |
| Ubisoft Paris | Developer | |
| Ubisoft Pune | Developer | |
| Ubisoft Quebec | Developer | |
| Ubisoft Reflections | Developer | |
| Ubisoft Romania | Developer | |
| Ubisoft SRL | Developer | |
| Ubisoft San Francisco | Developer | |
| Ubisoft Shanghai | Developer | |
| Ubisoft Singapore | Developer | |
| Ubisoft Sofia | Developer | |
| Ubisoft Toronto | Developer | |
| Ubisoft Vancouver | Developer | |
| UbisoftAU | Publisher | |
| UbisoftDE,FR | Publisher | |
| UbisoftEU | Publisher | |
| UbisoftEU,NA | Publisher | |
| UbisoftJP | Publisher | |
| UbisoftNA | Publisher | |
| UbisoftNA,PAL | Publisher | |
| UbisoftPAL | Publisher | |
| UbisoftUKNobilus FranceFR | Publisher | |
| UdragaCorp | Developer | |
| Udyr | Developer | |
| Ufo Crash Games | Developer | |
| Ugh1849 | Developer | |
| Ugly Beard Games | DeveloperPublisher | |
| Ugly Duckling Games | Developer | |
| Ugly Industries Holdings | Developer | |
| Ugly Pixels | Developer | |
| Uk_resistant | Developer | |
| UkaChaka | Developer | |
| Ukiwuki | Developer | |
| Ukiyo Publishing | DeveloperPublisher | |
| Ukiyotei | Developer | |
| UkuNano | Developer | |
| Ukuza | DeveloperPublisher | |
| Ulicon | Developer | |
| Ulises Freitas | Developer | |
| Ullucus Heaven | DeveloperPublisher | |
| UltDev | Developer | |
| Ultimapwn | Developer | |
| Ultimate Bounce 84 | Developer | |
| Ultimate Games | DeveloperPublisher | |
| Ultimate Play The Game | Publisher | |
| Ultimate Play the Game | DeveloperPublisher | |
| Ultimate Play the Game (U.K.) | Publisher | |
| Ultimate750 | Developer | |
| UltimateWalrus | Developer | |
| Ultimately | Developer | |
| Ultimateum | Developer | |
| Ultimation Inc. | Developer | |
| UltimoGames | Developer | |
| Ultizen Games | Developer | |
| Ultizero | Publisher | |
| Ultra X | Developer | |
| Ultra Dolphin Revolution | DeveloperPublisher | |
| Ultra Games | Publisher | |
| Ultra Games NA | Publisher | |
| Ultra Graphix | Developer | |
| Ultra Runaway Games | Developer | |
| Ultra Shenanigans | Developer | |
| Ultra Software Corporation | Publisher | |
| Ultra Ultra | DeveloperPublisher | |
| UltraBot | Developer | |
| UltraCoolHand | Developer | |
| UltraDwagon | Developer | |
| UltraRat | Developer | |
| UltraVioletGames | Developer | |
| Ultrabanaman | Developer | |
| Ultrakupra | Developer | |
| Ultrasoft | Developer | |
| Ultravioleta | Developer | |
| Ulvhamr | Developer | |
| Ulvra | Developer | |
| Ulydev | Developer | |
| Uma Tenshi | Developer | |
| Umaiki Games | DeveloperPublisher | |
| Umbra | Developer | |
| Umbra Games | Developer | |
| Umbral Knights | Developer | |
| Umbu Games | Developer | |
| Umby Pokochan | Developer | |
| Umiloo Studios | Developer | |
| UminoAoi | Developer | |
| Umitsuki Production | DeveloperPublisher | |
| Umizon | Developer | |
| UmutDjamming | Developer | |
| Un Je Ne Sais Quoi | DeveloperPublisher | |
| Un Kumo | Developer | |
| Un1t Bendy | Developer | |
| UnBird | Developer | |
| UnTalPaco | Developer | |
| Unai Estavillo Bonet | Developer | |
| UnalignedMCV | Developer | |
| Unbalance | DeveloperPublisher | |
| Unbound Creations | DeveloperPublisher | |
| Unboxed | Developer | |
| Unburnt Witch | Developer | |
| Uncanny Machines | Developer | |
| Uncaught { Exceptions | Developer | |
| UncaughtTypeError | Developer | |
| Uncle Hermie | Developer | |
| Uncle Yobo | Developer | |
| UncleAlex | Developer | |
| UncleJeol | Developer | |
| UncleNook | Developer | |
| UncleSimon | Developer | |
| UncommonBreedVN | Developer | |
| Uncredited | Publisher | |
| Und3rC0ver | Developer | |
| Unda Team | Developer | |
| Undead Aubergine | Developer | |
| Undead Avian Publishing | Developer | |
| Undead Cartridge | Developer | |
| Undead Labs | Developer | |
| Undead Leader | Developer | |
| Undead Studio | Developer | |
| UndeadKangaru | Developer | |
| Undefined | DeveloperPublisher | |
| Under Construction | Developer | |
| Under the code | Developer | |
| UnderCtrlGames | Developer | |
| Underbliss | Developer | |
| Undercoders | DeveloperPublisher | |
| Underflow Studios | Developer | |
| Undergames | Publisher | |
| Underground Arcade | Developer | |
| Underground Development | Developer | |
| Underground Pixel | Developer | |
| Underran | Developer | |
| Undersans886 | Developer | |
| UnderscoreFresh | Developer | |
| Undestroyed | Developer | |
| UndreamedPanic | Developer | |
| Unearthly | Developer | |