I'm usually a fan of open source games but rarely do they manage to be actually great. People like giving recommendations like Super Tux Kart that haven't aged well and don't play well. What are some open source games that are legitimately good that I've missed?
Not only is Endlessly open source, it has been crowd developed for years and years. It's still actively adding user content (stories, outfits, ships, races, etc) and has the only actually functional launcher I've ever seen (like if you want to play a stable release, or play in your own sandbox development area, etc). It's really great community of folks.