! Year
! Author
! Homebrew
! Plus<br/>features
! Description
! File
|-
||[[U.N. Squadron]]|| 1990 || U.S.Gold ||No|| No || Converted by dragon || [[Media:U.N. Squadron.rar | U.N. Squadron.rar]]
|-
||[[Unpredictaball]]|| 1992 || Video Images ||No|| No || Converted by Phantomz<br/> J1B2 = Pause (J1B1 = Resume game, Pause button = Quit game). || [[Media:Unpredictaball.rar | Unpredictaball.rar]]
|-
||[[Untouchables (The)]]|| 1989 || Ocean ||No|| No || Converted by Phantomz<br/>Pause button = Pause (Pause button = Quit game, any other button to resume game)<br/>CHEAT (Level skip): Just press J2B1 while playing || [[Media:Untouchables (The).rar | Untouchables (The).rar]]
|-
||[[Uridium]]|| 1986 || Hewson Consultants ||No|| No || Converted by CraigsBar || [[Media:Uridium.rar | Uridium.rar]]
|-
||[[Usagi Yojimbo]]|| 1988 || Firebird ||No|| No || Converted by Phantomz<br/>Trainer: J1B1 = Yes, J1B2 = No<br/>Main Menu: J2B1 = Swap Practice/Game (Swap to 'Game' mode before starting to play), J2B2 = Swap Joystick/Keyboard, Pause button = Start game<br/>Ingame: Pause button = Pause (any button to resume) / Skip the highscore table holding the button. || [[Media:Usagi Yojimbo.rar | Usagi Yojimbo.rar]]
|-
||[[Uwol 2 Quest For Money]]|| 2011 || The Mojon Twins ||Yes||No|| Converted by McKlain || [[Media:Uwol 2 Quest For Money.rar | Uwol 2 Quest For Money.rar]]
|}