Xonotic is an open-source, futuristic, fast-pased FPS game based on Nexuiz Classic (which is also the basis of Rexuiz). It's got one of the best communities in all of gaming, and its developers are some of its most prominent players. Overall, I think it's a very good game to pass time and/or waste time with.
That's why I uploaded Xonotic to itch.io, it's a great game and deserves more attention.
If this is in the wrong forum please tell me why, I will remove this post and post it in Release Announcements or wherever instead. I'm confused about the rules.