PEG document file stores Peggle game session replay data. Peggle is a multiplatform puzzle game for casual players. It is available for desktop computers, consoles, and iOS or Android mobile devices. PEG file is created automatically after each game round has finished.

In Peggle Nights game, PEG files are replaced with PEGN files. The files are saved in ‘replays’ folder located in game’s main file folder. Replay files can only by viewed in Peggle program.