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Ax Battler: A Legend of Golden Axe (Oct 8, 1991 prototype)
Ayrton Senna's Super Monaco GP II (Prototype)
CJ: Elephant Fugitive (Oct 22, 1993 prototype)
Chicago Syndicate (Mar 20, 1995 prototype)
Choplifter! (Sega Master System Prototype)
Cutthroat Island (Sep 16, 1995 prototype)
David Robinson's Supreme Court (Prototype)
Dinobasher Starring Bignose the Caveman (Game Gear Prototype)
Dinobasher Starring Bignose the Caveman (Master System Prototype)
Doki Doki Penguin Land: Uchuu Daibouken (Prototype)
Indiana Jones and the Last Crusade (Prototype)
James 'Buster' Douglas Knockout Boxing (Prototype)
James Bond 007: The Duel (Jun 16, 1993 prototype)
King's Quest: Quest for the Crown (Prototype)
Madou Monogatari III: Kyuukyoku Joou-sama (prototype)
Miracle Warriors: Seal of the Dark Lord (Feb 25, 1988 prototype)
Montezuma's Revenge (Jan 3, 1989 prototype)
Promocao Especial Sega Master System III Compact
Sega Graphic Board (Aug 25, 1987 prototype)
Sega Master System BIOS (M404 prototype)
Sega Master System BIOS (v1.0 prototype)
Sega Master System Color and Switch Test (Prototype)
Solomon no Kagi: Oujo Rihita no Namida (Prototype)
Strider Returns: Journey from Darkness (prototype)
Super Monaco GP Sega Master System (Prototype A)
Super Monaco GP Sega Master System (Prototype B)
Taz-Mania Sega Master System (Prototype)
The Lucky Dime Caper starring Donald Duck (May 28, 1991 prototype)
The Smurfs Travel the World (Aug 12, 1996 prototype)
Ys: Ancient Ys Vanished Omen (Prototype)
Dynamite Headdy (Earlier Game Gear Prototype)
Heroes of the Lance (Master System Prototype)
King's Quest: Quest for the Crown (Feb 3, 1989 prototype)
Lemmings 2: The Tribes (Game Gear Prototype)
Lemmings 2: The Tribes (Sega Master System Prototype)
Pat Riley Basketball (Sega Master System prototype)
Sonic the Hedgehog (Game Gear Prototype)
Special Criminal Investigation (Prototype)
Super Monaco GP Sega Master System (Jul 18, 1990 prototype)
Super Off Road (Sega Master System Prototype)
The Excellent Dizzy Collection (Prototype)
Ultima IV: Quest of the Avatar (Prototype)
Wonder Boy III: The Dragon's Trap (Prototype)
Yogi Bear in Yogi Bear's Goldrush (Prototype)