| mm7 | Might and Magic VII Saved Game |
| mm8 | Might and Magic VIII Saved Game |
| mmh | Dragon Age Model Mesh Heirarchy Data |
| mmx | Command and Conquer Map |
| mn2 | Descent 2 Mission Data |
| mn3 | Descent 3 Mission Data |
| mni | Star Trek Elite Force 2 Data |
| mo | Transport Fever Game Text Data |
| mob | Master of Orion 3 Game Data |
| mod3 | Monster Hunter World 3D Model Data |
| model | Warhammer 40000: Dawn of War 2 Model Data |
| modinfo | Civilization V Mod Information |
| modpak | Starbound Mod Package |
| modpkg | Minecraft PE Mod Package |
| mog | FootBall Mogul Data |
| momma | Offspring Fling Replay Data |
| mop | Dragon Age Player Data |
| mor | Dragon Age Toolset Head Morph |
| mos | Infinity Engine Bitmap Data |
| mp2 | Heroes of Might and Magic II Map |
| mp2m | Max Payne 2 Mod Data |
| mp2s | Max Payne 2 Saved Game |
| mpak | Battlestations: Midway Data |
| mpd | Vagrant Story Map Data |
| mpm | Max Payne Modfication |
| mpq | MoPaQ Archive |
| mr1 | Jumpman Lives! Game Data |
| mres | Homeworld Game MRES Data |
| mrh | Dragon Age Morph Source |
| mrl3 | Monster Hunter World Material Data |
| mrs | GunZ Data |
| ms1 | VirtualBus Map Data |
| ms2mml | MapleStory 2 Music |
| msh | DAT Mesh |
| msh | Star Wars Battlefront 3D Model |
