It’s not open source, but I do want to mention Barotrauma here – it’s not totally unheard of, but I don’t think many people realize that it’s a spiritual successor to SS13. Supports a lot less players, but still up to 12 or something on the bigger ships, and it manages to turn the absolute insanity of SS13 into a compelling survival game that still has plenty of goofiness.
It’s not open source, but I do want to mention Barotrauma here – it’s not totally unheard of, but I don’t think many people realize that it’s a spiritual successor to SS13. Supports a lot less players, but still up to 12 or something on the bigger ships, and it manages to turn the absolute insanity of SS13 into a compelling survival game that still has plenty of goofiness.