.MCGAME File Extension
File TypeMinecraft Game Backup File
What is an MCGAME file?
Game installation archive created by Minecraft Launcher, a custom launcher for the game Minecraft; stores the game files in a compressed .ZIP format; not supported officially by Minecraft, but sometimes used for backing up specific versions of the game.
NOTE: Minecraft Launcher is available for Windows, Mac, and Linux. You can either download the Java version (MinecraftSP.jar), which works on all platforms, or the native version for Windows or Mac.