GMnet ENGINE is a multiplayer engine for Game Maker: Studio by YoYoGames. It works by syncing instance variables to other players and has many other features. If you want to get started and learn how to use GMnet ENGINE, start with the Tutorial.
GMnet ENGINE is bundled with GMnet PUNCH. All functionality is implemented in GMnet ENGINE. You don’t need to read the PUNCH manual. If you want to use GMnet PUNCH with your own multiplayer engine, please continue reading the GMnet PUNCH manual instead.