- U-Boat Commander II
- UFO.io - Abduct Everything
- Uh Oh! - Avoid all traps
- Ukodus Crazy
- Ukraine Simulator
- Ukraine Simulator 2
- アルティメットエイリアンディフェンス
- Ultimate Animal Sniper Shootin
- Bank Robbery Armed Heist Game
- 究極のバトルロワイヤルPvP
- Ultimate Battle Simulator
- 究極のバトルシミュレータ - エピック
- Ultimate Block Puzzle Solver
- Ultimate Custom Night
- Ultimate Dice Wars: Reborn
- Ultimate General: Gettysburg
- Ultimate General™: Civil War
- Ultimate General™: Gettysburg
- Ultimate Metal Trader
- Ultimate Prepper
- Reversiの王
- Ultimate Supremacy
- Ultimate Tank Defender
- 究極の三目並べ
- Ultimate Tic Tac Toe ll
- Ultimate Tic Tac Toe!
- Ultimate War - Great Strategy TD Game
- 超次元防衛
- Unblock 2 - let me out
- Unblock Ball : Puzzle Game
- Unblock Bar - パズルブロックをスライドさせ、解放
- Unblock Block!
- Unblock Blue Block Puzzle
- Unblock Car: 3D Parking Puzzle
- Unblock FRVR
- Unblock Puzzle Classic
- Unblock Woods
- Unbuild
- 大航海大戦: オーシャン& エンパイア
- アンデッドバトルフィールド
- Undead Dread
- UNDEAD FACTORY : リアルタイムストラテジー
- アンデッドvsデーモン
- Under Par Scorecard
- UnderControl3D
- Underwater Road Construction
- Underworld Empire
- Underworld Football Manager 2
- Underworld Football Manager
- Underworlds Helper
- Unfold!
- Unicorn Evolution Clicker Game
- Unicorn Universe
- Unified Dynasty
- Unifying The Three Kingdoms
- ユニークなWar Survivorゲーム
- Unite Guide
- United Kingdom Simulator 2
- Universal Battle 2
- Universal Paperclips™
- Universe Pandemic 2
- University Empire Tycoon-Idle
- UniWar: Multiplayer Strategy
- Unknown Craft Battle Royale 3D
- アンノウンナイツ
- 無限スキル勇者
- Unlimited Zombies
- ロープを解く
- Unlock The LOCK Free
- Unmatched Air Traffic Control
- Unscramble Words
- Unstaball: Catch It & Throw It
- Untie The Rope!!
- Until Dead - Think to survive
- Upgrade Tower Defense
- Uphill Railway Track Build Pro
- Urban Drug Empire
- インターネットカフェシミュレーター2
- US Army Critical Military War
- US Conflict — Tank Battles
- US Election Game
- US Military Sniper Shoot War
- アメリカのやぼう
- USA Simulator 2
- USA Simulator Pro 2
- Used Car Tycoon Games
- Utopia - utopia-game.com