MAME
MAME - Multiple Arcade Machine Emulator
13449 cartouches
Various
1997
Options Unlimited (Barcrest) (MPU3)
MAME
Opus 2791 Fdc
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Opus 8272 Fdc
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Opus Challenger 3-in-1
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Opus Challenger ADFS
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Opus D-dos
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Opus Discovery
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Oracle (Dutch) (Bellfruit) (Scorpion 1)
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Orange Club - Maruhi Kagai Jugyou
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Orange Micro Buffered Grappler+ Printer Interface
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Orange Micro Grappler Printer Interface
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Oranges And Lemons (Bellfruit) (Black Box) (10p Stake, £2 Jackpot)
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Orao 102
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Orao 103
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Orbatak (prototype)
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Orbit
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Orbit 9090 - The Dance Planet
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Orbitor 1
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Orbitron
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Orbs
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Orchid Mist (0200849V, NSW/ACT)
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Ordenador-TV (Spain)
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Ordisavant (France)
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Ordyne
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Organiser I
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Organiser II CM
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Organiser II LA
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Organiser II LZ
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