Steam. Xbox, PS4, etc. have trophy/achievement systems. Even games not on a platform with achievements may display achievements in game. LibGamerzilla is a new open source achievement system I've been working on. I have used it under Linux and cross-compiled it under Windows. I have not compiled it with Microsoft Visual Studio but it should be pretty easy. It saves and synchronizes trophy/achievement information automatically. Gamerzilla is a Hubzilla plugin. LibGamerzilla can upload all your achievements to your Hubzilla account. Additional servers could be added in the future including perhaps a standalone trophy/achievement service.
There is a slightly out of date video: Gamerzilla Video
Website is also in need of an update. Support for GameHub launcher has been coded and is awaiting merging into the project. I've written two Open Game Source articles talking about adding it to games (http://identicalsoftware.com/games/seahorse and http://identicalsoftware.com/games/smalltrek).If anyone is interested in adding support to there game, let me know if you have any problems or suggestions.
