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|logo = GGPO.png|logowidth = 138px120|version = 0.3032|active = No|platform = [[Emulators on Windows|Windows]]|type = Middleware|developer = Tony Cannon|website = [http://ggpo.org/ ggpo.orgnet]|source = [https://github.com/pond3r/ggpo GitHub]|license = MIT License

 '''GGPO''' (an acronym for '''<u>G</u>ood <u>G</u>ame <u>P</u>eace <u>O</u>ut''') is an open source middleware developed by Tony Cannon in 2006. It's designed to hide the appearance of lag in online multiplayer, and does so using a technique called rollback networking. It was first implemented as a web service using [[FinalBurn Alpha]] but, because it distributed ROMs to players, it didn't last very long. Cannon used this site for two purposes; to adjust the code according to feedback from players, and to market GGPO to game developers. Eventually, it was incorporated into games like Skullgirls and Street Fighter III: 3rd Strike Online Edition. While the GGPO service doesn't exist anymore, alternatives exist; Cannon recommends using [[FightCade]] specifically.