| | Mazin Wars / Mazin Saga (Mega Play) | 1993 | Sega | mp_mazin | Unplayable | 8.00 |
 | Meijinsen | 1986 | SNK | meijinsn | Unplayable | 0.00 |
 | Midnight Run (Euro v1.11) | 1995 | Konami | midnrun | Unplayable | 0.00 |
| | Monza GP | 1981 | Olympia | monzagp | Unplayable | 0.00 |
| | Moonquake | 1987 | Sente | mquake | Unplayable | 0.00 |
 | Night Love (Japan 860705) | 1986 | Central Denshi | nightlov | Unplayable | 0.00 |
 | Opa Opa (MC-8123, 317-0042) | 1987 | Sega | opaopa | Unplayable | 5.00 |
| | Oriental Legend Special / Xi You Shi E Zhuan Super (ver. 100, set 1) (clone of: olds) | 1998 | IGS | olds100 | Unplayable | 0.00 |
| | Oriental Legend Special / Xi You Shi E Zhuan Super (ver. 100, set 2) (clone of: olds) | 1998 | IGS | olds100a | Unplayable | 0.00 |
| | Oriental Legend Special / Xi You Shi E Zhuan Super (ver. 101, Korean Board) | 1998 | IGS | olds | Unplayable | 4.86 |
 | Osman (World) | 1996 | Mitchell | osman | Unplayable | 8.00 |
 | Otogizoushi Urashima Mahjong (Japan) | 1989 | UPL | urashima | Unplayable | 0.00 |
 | Paint & Puzzle | 1969 | Century? | pntnpuzl | Unplayable | 0.00 |
 | Parallel Turn | 1984 | Jaleco | pturn | Unplayable | 4.00 |
 | Party Time: Gonta the Diver II / Ganbare! Gonta!! 2 (World Release) | 1995 | Mitchell | prtytime | Unplayable | 7.50 |
 | Phraze Craze (set 1) | 1986 | Merit | phrcraze | Unplayable | 4.00 |
| | Pilot Kids (Model 2A) (clone of: pltkids) | 1998 | Psikyo | pltkidsa | Unplayable | 0.00 |
| | Pilot Kids (Model 2B, Revision A) | 1998 | Psikyo | pltkids | Unplayable | 0.00 |
 | Pinball Champ '95 (bootleg?) (clone of: witch) | 1995 | bootleg? (Veltmeijer Automaten) | pbchmp95 | Unplayable | 0.00 |
| | Ping Pong Masters '93 | 1993 | Electronic Devices S.R.L. | ppmast93 | Unplayable | 6.50 |
