When comparing OpenRA vs Cube 2 (Sauerbraten), the Slant community recommends OpenRA for most people. In the question“What are the best open-source games?” OpenRA is ranked 19th while Cube 2 (Sauerbraten) is ranked 96th. The most important reason people chose OpenRA is:
Classic Command and Conquer with overhauled UI, rebalanced gameplay, replays and observer mode.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Modern improved recreation of the classic game
Classic Command and Conquer with overhauled UI, rebalanced gameplay, replays and observer mode.
Pro Fosters creativity
Features an in-game map editor and is geared towards modding.
Pro Good map editor
Pro Multi-platform
Linux, Windows, OSX
Pro Fast and smooth
Graphics not resource intensive. Compared favorably to Unreal engine.
Pro Free
Available under an open source license
Cons
Con In a grey zone
(The C&C guys are actually well aware of this project and are fine with it... so this isn't true.)
All CnC assets are still copyrighted by Westwood/EA and not freely available anymore, so per law, it is illegal to share them as mods. Also, Dune was never available as free download, which makes the whole mod illegal as well.