It freezes in mission 4 of the first campaign.

Gentlemen, if anyone is still reading and visiting, the solution is simple! After you pass through the dwarf garrison for the first time, don't go and kill the Tanos on the right, whom you can theoretically defeat. The game only freezes if you clear them out. I've checked several times, and it works. The problem is solved! If you managed to do it, please reply here! Thank you for your attention.