The game accesses files with the MPM file extension when a musical score or sound effect is needed. Musical score is included in games to add effect in certain parts of the storyline. Sound effects are used when the player achieves a certain part of the game.
The MPM file extension is used to signify compressed Max Payne game modification files. MPM files can be edited with the appropriate software. The MPM file extension is also used to refer to MPEG movie files created with the MPEG-1 and MPEG-2 layer compression algorithms.