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?
Like many open source games, it has that distinctly 'alpha' feel to it right now, but I do enjoy NodeCore on occasion. It's a zen minimalist block game with a unique diagetic crafting system. Instead of a traditional "recipe book" or "crafting grid", you produce new materials through in-world transformations. For instance, to make glass, you have to surround sand with fire, and to control fire, you basically want to build a deliberately-shaped dirt or stone pit... the whole thing feels a little like minecraft and a little like a sand physics sim or cellular automata.