This is one of the best RTS games of all time. And I say this as someone who played it on release and dealt with several issues. The AI was incredibly bad in skirmish/custom games. A better tutorial could have been put in place for unit training - I remember this being mostly a guessing game as to what kind of unit you will make. And the most annoying issue I had, though this could be fixed, is your units will 95% of the time just do w/e they want during battle - micro management was non-existent. But the game is innovative, encourages aggressive/smart play and was pretty balanced, in my opinion, on release. Just the fact their are 4 races makes this very replay-able along with a multi-choice multi-outcome single player campaign that is pretty challenging I may add (however most of the challenge when I played it was fighting with bugs like the ones I mentioned before). I have not seen this issue mentioned in other reviews so it is likely cleared up. I would also like to add I never had any clue an expansion was released for this until seeing it here so I cannot comment on that part of the game. 10$ is well worth it for anyone who has not experienced this. If you like RTS this is a must own. If you don't like RTS I am not as quick as other reviewers to persuade you to open your wallet. Be real, if you don't like RTS the innovations made in the genre are meaningless.