||[[U.N. Squadron]]|| 1990 || U.S.Gold ||No|| No || Converted by dragon || [[Media:U.N. Squadron.rar | U.N. Squadron.rar]]
|-
||[[Unpredictaball]]|| 2017 || Video Images ||Yes|| No || Converted by Phantomz<br/> J1B2 = Pause (J1B1 = Resume game, Pause button = Quit game)<br/>A never released game developed by David Bradley in 1992, recovered and spread in 2017 by Dean Hickingbottom. || [[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]]