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Perhaps I'm not the first person interested in this problem, but I've encountered it quite often. I installed and patched the game to version 3.1. Everything works perfectly, the campaign runs fine, but every time I try to launch any other mode, it crashes during loading. Interestingly, on the same computer, there are also 2 other versions of the game installed: 3.0 and 3.1, and both of them work. (Regarding the possible question about why there are so many versions, it's due to difficulties in cooperative online play.) Thank you in advance.