| Game | Cheats List | |||
| Megamind: Mega Team Unite | Savegame | |||
| Mercury Meltdown Revolution | Hints | |||
| Metal Slug Anthology | Hints | |||
| Metroid | Hints | |||
| Metroid: Other M | Hints, Savegame | |||
| Metroid Prime 3: Corruption | Trainer, Savegame, Hints | |||
| Metroid Prime Trilogy | Savegame, Hints | |||
| Military Madness | Cheat Codes | |||
| Mini Ninjas | Savegame | |||
| MLB Power Pros | Cheat Codes | |||
| Mobile Suit Gundam: MS Sensen 0079 | Savegame | |||
| Monopoly | Hints | |||
| Monster 4x4: World Circuit | Hints, Savegame | |||
| Monster High Ghoul Spirit | Cheat Codes | |||
| Monster Hunter G | Hints | |||
| Monster Hunter Tri | Hints | |||
| Monster Lab | Gecko Codes | |||
| Mortal Kombat: Armageddon | Cheat Codes, Hints | |||
| Mr. Driller W | Hints | |||
| Muramasa: The Demon Blade | Savegame, Hints | |||
| Mushroom Men: The Spore Wars | Hints | |||
| MX vs. ATV Untamed | Cheat Codes | |||
| My Aquarium | Savegame | |||
| My Pokemon Ranch | Hints | |||
| MySims | Cheat Codes, Hnts | |||
| MySims Agents | Cheat Codes, Hints | |||
| MySims Kingdom | Cheat Codes, Hints | |||
| MySims Party | Hints | |||
| MySims Racing | Cheat Codes | |||
| Mystery Case Files: The Malgrave Incident | Hints | |||
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