- UnderDread
- UnderEarth
- UNDERGROUND CLUB 2018 v1.2
- Underground Keeper
- Underhero v4.0.7
- Underland
- Underland: The Climb
- Underlings
- UnderMine v0.3.3.8
- UnderParty
- Underponder
- UnderRail (v1.1.1.3 & ALL DLC)
- Understand
- Undertaker’s
- Undertale v1.08c
- Underwater
- UnderWater Adventure
- Underwater hunting
- Underworld Ascendant (Update 4 & ALL DLC)
- UNDERZONE
- Undholm
- Undiscovered House
- UNDYING
- Unearned Bounty
- Unearthed: Trail of Ibn Battuta – Episode 1 – Gold Edition
- Unearthing Colossal
- Unearthing Mars VR
- Unearthing Mars VR
- Unending Dusk v1.1.0
- Unending Galaxy v1.3.6.0
- UnEpic v1.5.1.0
- Unexplored 2: The Wayfarer’s Legacy
- Unexplored v1.19.5
- Unfair Jousting Fair
- Unfamiliar
- Unferat
- Unforeseen Incidents
- Unforgiven VR
- Unforgiven: Missing Memories – Child’s Play
- Unforgiving A Northern Hymn v1.1.0
- Unforgiving Happiness
- Unforgiving Trials: The Darkest Crusade
- Unfortunate Spacemen
- Unhack (Inclu Destruction DLC)
- Unhack 2
- Unhappy Ever After v1.0.1.0
- Unheard (ALL DLC)
- UNHERD
- Unholy Alliance – Tower Defense
- UnHolY DisAsTeR
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