An RPGMVP file is a .PNG image that has been encrypted by RPG Maker MV, a program used to create role-playing games (RPG). It contains a PNG image resource for an element in the game, such as the appearance of a character or object. RPGMVP files are encrypted by RPG Maker MV when deploying a project as an executable package to be played by other users.
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When creating a game in RPG Maker MV, the user creates PNG image resources for different elements of the game. When the project is deployed, the images are encrypted and placed in the game directory:
Documents\<Game Title>\www\img\
The images are encrypted to protect against modification and are not meant to be manually opened. However, users can decrypt RPGMVP files using Petschkos RPG-Maker MV-File Decrypter.