U-boat 65
U.N. Defense Force: Earth Joker (Japan)
U.N. Defense Force: Earth Joker (Japan, prototype?)
U.N. Squadron (USA)
U.S. Championship V'ball (bootleg of US set)
U.S. Championship V'ball (Japan)
U.S. Championship V'ball (bootleg of Japan set)
U.S. Championship V'ball (US)
U.S. Classic
U.S. Navy (Japan 901012)
U.S.A. Football
Uchuu Daisakusen: Chocovader Contactee (Japan, CVC1 Ver.A)
Uchuu Tokkyuu Medalian
UFO Catcher 21
UFO Catcher 800
UFO Catcher Mini
UFO Master-Blaster Station
Ufo Robo Dangar (12/1/1986)
Ufo Robo Dangar (9/26/1986)
Ufo Robo Dangar (bootleg)
Ufo Robo Dangar (9/26/1986, Japan)
Ufo Senshi Yohko Chan (bootleg, not encrypted)
Ufo Senshi Yohko Chan (MC-8123, 317-0064)
UFO-X
UK-2086 ver. 1.2
UK101
UKNC
Ultimate (Dutch) (Bellfruit) (Scorpion 1)
Ultimate Arctic Thunder
Ultimate Arctic Thunder Update CD ver 1.950 (5/3/04)
