Files with psm extension are used for old computer games developed by the Epic MegaGames. They contain audio and sound data.
PSMM file extension - Epic game sound data file
What is psmm file? How to open psmm files?
File type specification:
File extension psm is mainly associated with old computer games developed by the Epic MegaGames. Epic is now known as the developer of Unreal Engine software for old computer games.