| | Ooh Aah Dracula (Barcrest) (MPU4) (set 9) (clone of: m4oadrac) | 1969 | Bwb / Barcrest | m4oadrac__h | | 0.00 |
| | Ooh Aah Dracula (Barcrest) (MPU5) (set 1) | 1969 | Barcrest | m5oohaah | | 0.00 |
| | Ooh Aah Dracula (Barcrest) (MPU5) (set 2) (clone of: m5oohaah) | 1969 | Barcrest | m5oohaah01 | | 0.00 |
| | Ooh Aah Dracula Club (Barcrest) (MPU5) (set 1) | 1969 | Barcrest | m5draclb | | 0.00 |
| | Ooh Aah Dracula Club (Barcrest) (MPU5) (set 2) (clone of: m5draclb) | 1969 | Barcrest | m5draclb07 | | 0.00 |
| | Ooh Aah Dracula Club (Barcrest) (MPU5) (set 3) (clone of: m5draclb) | 1969 | Barcrest | m5draclb01 | | 0.00 |
| | Ooh Ahh Dracula Rio (Barcrest) (MPU5) | 1969 | Barcrest | m5oohrio | | 0.00 |
| | Oozumou - The Grand Sumo (DECO Cassette, Japan) | 1984 | Data East Corporation | coozumou | | 0.00 |
 | Opa Opa (MC-8123, 317-0042) | 1987 | Sega | opaopa | Unplayable | 5.00 |
| | Open Mahjong [BET] (Japan) (clone of: royalmj) | 1969 | Sapporo Mechanic | openmj | | 0.00 |
| | Open Sesame (Bellfruit) (Scorpion 4) (set 1) | 1969 | BFM | sc4opses | | 0.00 |
| | Open Sesame (Bellfruit) (Scorpion 4) (set 2) (clone of: sc4opses) | 1969 | BFM | sc4opsesa | | 0.00 |
| | Open The Box (Ace) (sp.ACE) (set 1) | 1969 | Ace | sp_openb | | 0.00 |
| | Open The Box (Ace) (sp.ACE) (set 10) (clone of: sp_openb) | 1969 | Ace | sp_openbi | | 0.00 |
| | Open The Box (Ace) (sp.ACE) (set 2) (clone of: sp_openb) | 1969 | Ace | sp_openba | | 0.00 |
| | Open The Box (Ace) (sp.ACE) (set 3) (clone of: sp_openb) | 1969 | Ace | sp_openbb | | 0.00 |
| | Open The Box (Ace) (sp.ACE) (set 4) (clone of: sp_openb) | 1969 | Ace | sp_openbc | | 0.00 |
| | Open The Box (Ace) (sp.ACE) (set 5) (clone of: sp_openb) | 1969 | Ace | sp_openbd | | 0.00 |
| | Open The Box (Ace) (sp.ACE) (set 6) (clone of: sp_openb) | 1969 | Ace | sp_openbe | | 0.00 |
| | Open The Box (Ace) (sp.ACE) (set 7) (clone of: sp_openb) | 1969 | Ace | sp_openbf | | 0.00 |
