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Under Fire (World)	USA Pro Basketball (Tourvision PCE bootleg)	Ultraman Club - Tatakae! Ultraman Kyoudai!!	Ultra Balloon

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Letter: U

• 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 Japan set)
• U.S. Championship V'ball (bootleg of US set)
• U.S. Championship V'ball (Japan)
• 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 Robo Dangar (12/1/1986)
• Ufo Robo Dangar (9/26/1986)
• Ufo Robo Dangar (bootleg)
• Ufo Senshi Yohko Chan (bootleg, not encrypted)
• Ufo Senshi Yohko Chan (MC-8123, 317-0064)
• UFO-X
• Ultimate (Dutch) (Bellfruit) (Scorpion 1)
• Ultimate Challenge (Maygay) (M1A/B) (set 1)
• Ultimate Challenge (Maygay) (M1A/B) (set 2)
• Ultimate Challenge (Maygay) (M1A/B) (set 3)
• Ultimate Challenge (Maygay) (M1A/B) (set 4)
• Ultimate Ecology (Japan 931203)
• Ultimate Mortal Kombat 3 (rev 1.0)
• Ultimate Mortal Kombat 3 (rev 1.1)
• Ultimate Mortal Kombat 3 (rev 1.2)
• Ultimate Nudge (Summit Coin)
• Ultimate Tennis
• Ultimate Tennis (v 1.4, Japan)
• Ultimo (Barcrest) (MPU5) (set 1)
• Ultimo (Barcrest) (MPU5) (set 2)
• Ultimo (Barcrest) (MPU5) (set 3)
• Ultra Balloon
• Ultra Invaders
• Ultra Maru-hi Mahjong (Japan)
• Ultra Tank
• Ultra Toukon Densetsu (Japan)
• Ultra X Weapons / Ultra Keibitai
• Ultra X Weapons / Ultra Keibitai (GAMEST review build)
• Ultraman (Japan)
• Ultraman Club - Tatakae! Ultraman Kyoudai!!
• Umi de Poker / Marine Paradise (Japan)
• Uncle Fester's Quest: The Addams Family (PlayChoice-10)
• Uncle Poo
• Under Defeat (GDL-0035)
• Under Fire (Japan)
• Under Fire (US)
• Under Fire (World)
• Under Siege (Maygay) (M1A/B) (set 1)
• Under Siege (Maygay) (M1A/B) (set 2)
• Under Siege (Maygay) (M1A/B) (set 3)
• Under Siege (Maygay) (M1A/B) (set 4)
• Undercover Cops (Japan)
• Undercover Cops (US)
• Undercover Cops (World)
• Undercover Cops - Alpha Renewal Version
• Unibox (Union) (MPU4, set 1)
• Unibox (Union) (MPU4, set 2)
• Union Jackpot (JPM) (SYSTEM5, set 1)
• Union Jackpot (JPM) (SYSTEM5, set 2)
• Union Jackpot (JPM) (SYSTEM5, set 3)
• Unique (Union) (MPU4, set 1)
• Unique (Union) (MPU4, set 2)
• Universe (Barcrest) (Dutch) (MPU4) (DUN)
• UniWar S
• unknown '008' (Unk) (MPS)
• unknown 'chsnsn05' (Unk) (MPS)
• unknown 'Electrocoin' Fruit Machines (Electrocoin) (set 1)
• unknown 'Electrocoin' Fruit Machines (Electrocoin) (set 2)
• unknown 'Electrocoin' Fruit Machines (Electrocoin) (set 3)
• unknown 'Electrocoin' Fruit Machines (Electrocoin) (set 4)
• unknown 'IGS 6POKER2' game (V312CN)
• unknown 'lhs' (Unk) (MPS)
• unknown 'ncsp0pp' (Bwb) (MPS)
• unknown 'nn_2' (Unk) (MPS)
• unknown 'nprpopp' (Bwb) (MPS)
• unknown 'nsc15' (Pcp) (MPS)
• unknown 'nsw12' (Pcp) (MPS)
• unknown 'rm941' (Unk) (MPS)
• unknown 'T' (MAB PCB?) (Concept Games Ltd) (?)
• unknown 186 based gambling game (V398)
• unknown 186 based gambling game (V399)
• unknown Astra 'ACP' (Astra, V403)
• unknown encrypted poker game
• unknown fighting game 'BB' (prototype)
• unknown French poker game
• unknown H8 Italian Gambling game
• unknown Japanese horse gambling game
• unknown MPU4 'CH3 0.1' (Barcrest) (MPU4)
• unknown MPU4 'CLD 0.2C' (MPU4?)
• unknown MPU4 'CTP 0.4' (MPU4?)
• unknown MPU4 'HOT 3.0' (MPU4?)
• unknown MPU4 'Joker' (MPU4?) (set 1)
• unknown MPU4 'Joker' (MPU4?) (set 2)
• unknown MPU4 'Joker' (MPU4?) (set 3)
• unknown MPU4 'Joker' (MPU4?) (set 4)
• unknown MPU4 'STC 0.1' (Barcrest) (MPU4)
• unknown MPU4 'TTO 1.1' (MPU4?)
• unknown MPU4 'W Nudge' (MPU4?)
• unknown MPU4 'ZTP 0.7' (MPU4?)
• unknown Pac-Man gambling game
• unknown pinball game
• unknown Ramtek Game (Maybe Hockey?) [TTL]
• unknown Scorpion 1 'Super ?' (Bellfruit) (Scorpion 1)
• unknown Sidam Poker
• unknown Sisteme France Poker
• unknown SRU Game (JPM?)
• unknown TMS9980 Poker Game
• unknown Toptronic pinball game
• Untouchable (Japan)
• Untouchables (JPM) (IMPACT) (set 1)
• Untouchables (JPM) (IMPACT) (set 2)
• Up & Over (Barcrest) (MPU5) (set 1)
• Up & Over (Barcrest) (MPU5) (set 2)
• Up & Under (Project) (PROCONN)
• Up For Grabs (Mazooma) (Scorpion 4) (set 1)
• Up For Grabs (Mazooma) (Scorpion 4) (set 2)
• Up For It (Bellfruit) (Scorpion 4) (set 1)
• Up For It (Bellfruit) (Scorpion 4) (set 2)
• Up For It (Bellfruit) (Scorpion 4) (set 3)
• Up For It (Bellfruit) (Scorpion 4) (set 4)
• Up For It (Bellfruit) (Scorpion 4) (set 5)
• Up For It (Bellfruit) (Scorpion 4) (set 6)
• Up Pompay (Ace) (IMPACT) (set 1)
• Up Pompay (Ace) (IMPACT) (set 2)
• Up Pompay (Ace) (IMPACT) (set 3)
• Up Pompay (Ace) (IMPACT) (set 4)
• Up Pompay (Bellfruit) (Scorpion 5) (set 1)
• Up Pompay (Bellfruit) (Scorpion 5) (set 2)
• Up Pompay (Bellfruit) (Scorpion 5) (set 3)
• Up Scope
• Up Up and Away (Barcrest) (MPU4) (set 1)
• Up Up and Away (Barcrest) (MPU4) (set 10)
• Up Up and Away (Barcrest) (MPU4) (set 11)
• Up Up and Away (Barcrest) (MPU4) (set 12)
• Up Up and Away (Barcrest) (MPU4) (set 13)
• Up Up and Away (Barcrest) (MPU4) (set 14)
• Up Up and Away (Barcrest) (MPU4) (set 15)
• Up Up and Away (Barcrest) (MPU4) (set 16)
• Up Up and Away (Barcrest) (MPU4) (set 17)
• Up Up and Away (Barcrest) (MPU4) (set 18)
• Up Up and Away (Barcrest) (MPU4) (set 19)
• Up Up and Away (Barcrest) (MPU4) (set 2)
• Up Up and Away (Barcrest) (MPU4) (set 20)
• Up Up and Away (Barcrest) (MPU4) (set 21)
• Up Up and Away (Barcrest) (MPU4) (set 22)
• Up Up and Away (Barcrest) (MPU4) (set 23)
• Up Up and Away (Barcrest) (MPU4) (set 24)
• Up Up and Away (Barcrest) (MPU4) (set 25)
• Up Up and Away (Barcrest) (MPU4) (set 26)
• Up Up and Away (Barcrest) (MPU4) (set 27)
• Up Up and Away (Barcrest) (MPU4) (set 28)
• Up Up and Away (Barcrest) (MPU4) (set 29)
• Up Up and Away (Barcrest) (MPU4) (set 3)
• Up Up and Away (Barcrest) (MPU4) (set 30)
• Up Up and Away (Barcrest) (MPU4) (set 31)
• Up Up and Away (Barcrest) (MPU4) (set 32)
• Up Up and Away (Barcrest) (MPU4) (set 33)
• Up Up and Away (Barcrest) (MPU4) (set 34)
• Up Up and Away (Barcrest) (MPU4) (set 35)
• Up Up and Away (Barcrest) (MPU4) (set 36)
• Up Up and Away (Barcrest) (MPU4) (set 37)
• Up Up and Away (Barcrest) (MPU4) (set 38)
• Up Up and Away (Barcrest) (MPU4) (set 39)
• Up Up and Away (Barcrest) (MPU4) (set 4)
• Up Up and Away (Barcrest) (MPU4) (set 40)
• Up Up and Away (Barcrest) (MPU4) (set 41)
• Up Up and Away (Barcrest) (MPU4) (set 42)
• Up Up and Away (Barcrest) (MPU4) (set 43)
• Up Up and Away (Barcrest) (MPU4) (set 44)
• Up Up and Away (Barcrest) (MPU4) (set 45)
• Up Up and Away (Barcrest) (MPU4) (set 46)
• Up Up and Away (Barcrest) (MPU4) (set 47)
• Up Up and Away (Barcrest) (MPU4) (set 48)
• Up Up and Away (Barcrest) (MPU4) (set 49)
• Up Up and Away (Barcrest) (MPU4) (set 5)
• Up Up and Away (Barcrest) (MPU4) (set 50)
• Up Up and Away (Barcrest) (MPU4) (set 51)
• Up Up and Away (Barcrest) (MPU4) (set 52)
• Up Up and Away (Barcrest) (MPU4) (set 53)
• Up Up and Away (Barcrest) (MPU4) (set 54)
• Up Up and Away (Barcrest) (MPU4) (set 6)
• Up Up and Away (Barcrest) (MPU4) (set 7)
• Up Up and Away (Barcrest) (MPU4) (set 8)
• Up Up and Away (Barcrest) (MPU4) (set 9)
• Up Yer Riggin Club (Global) (v2.8 Protocol) (Stealth)
• Up Yer Riggin Club (Global) (v2.8) (Stealth)
• Up Your Alley
• Up'n Down (315-5030)
• Up'n Down (not encrypted)
• US AAF Mustang (25th May. 1990 / Seoul Trading)
• US AAF Mustang (25th May. 1990)
• US AAF Mustang (bootleg)
• US AAF Mustang (TAB Austria bootleg)
• Us vs. Them
• USA Pro Basketball (Tourvision PCE bootleg)
• Usagi - Yamashiro Mahjong Hen (GDL-0022)
• Utter Nutter (Global) (EPOCH) (set 1)
• Utter Nutter (Global) (EPOCH) (set 2)
• Utter Nutter (Global) (EPOCH) (set 3)
• Utter Nutter (Global) (EPOCH) (set 4)
• Utter Nutter Club (Global) (EPOCH) (set 1)
• Utter Nutter Club (Global) (EPOCH) (set 2)