| | Mahjong Jong-Tei (Japan, ver. NM532-01) | 1999 | Dynax | jongtei | | 0.00 |
| | Mahjong Mania - Kairakukan e Youkoso (Japan) | 1999 | Sphinx/Just&Just; | mjmania | | 0.00 |
| | Mahjong Oh (V2.06J) | 1999 | Warashi / Mahjong Kobo / Taito | mahjngoh | | 0.00 |
| | Mallet Madness v2.1 | 1999 | Hanaho Games | maletmad | | 6.33 |
| | Mario Kart (Maygay) (EPOCH) (1.1, set 5) (clone of: ep_mkart) | 1999 | Maygay | ep_mkartd | | 0.00 |
| | Mario Kart (Maygay) (EPOCH) (1.2, set 1) | 1999 | Maygay | ep_mkart | | 8.33 |
| | Mario Kart (Maygay) (EPOCH) (1.2, set 2) (clone of: ep_mkart) | 1999 | Maygay | ep_mkarta | | 0.00 |
| | Mario Kart (Maygay) (EPOCH) (1.5, set 6) (clone of: ep_mkart) | 1999 | Maygay | ep_mkarte | | 0.00 |
| | Mario Kart (Maygay) (EPOCH) (1.6, set 3) (clone of: ep_mkart) | 1999 | Maygay | ep_mkartb | | 0.00 |
| | Mario Kart (Maygay) (EPOCH) (1.6, set 4) (clone of: ep_mkart) | 1999 | Maygay | ep_mkartc | | 0.00 |
| | Medieval Madness (1.0 Ultrapin) (clone of: mm_10) | 1999 | Williams | mm_10u | | 0.00 |
| | Medieval Madness (1.0) | 1999 | Williams | mm_10 | | 8.33 |
| | Medieval Madness (1.09) (clone of: mm_10) | 1999 | Williams | mm_109 | | 0.00 |
| | Medieval Madness (1.09B) (clone of: mm_10) | 1999 | Williams | mm_109b | | 0.00 |
| | Medieval Madness (1.09C Profanity) (clone of: mm_10) | 1999 | Williams | mm_109c | | 0.00 |
| | Merlin's Magic (Maygay) (EPOCH) (1.91) | 1999 | Maygay | ep_merln | | 0.00 |
 | Metal Slug X - Super Vehicle-001 (NGM-2500)(NGH-2500) | 1999 | SNK | mslugx | Platform / Shooter Scrolling | 9.31 |
| | Microman Battle Charge (J 990326 V1.000) | 1999 | Sega | micrombc | | 0.00 |
| | More More | 1999 | SemiCom / Exit | moremore | Mini-Games | 5.33 |
 | More More Plus | 1999 | SemiCom / Exit | moremorp | Mini-Games | 4.00 |
