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Mr.Slash: the game runs very badly on AMD GPUs. on my r9 270x runs on 17-30fps in the first map. There is a fix for this problem? Thx
If you're using Galaxy, there was an update that is supposed to address AMD performance issues uploaded by the developers today. If you're not seeing this update yet and you are using Galaxy then run a "Verify & Repair" check and that will force the update :)

If you are using the offline version then you might have to wait a bit as the game is quite large (over 22 GB) so it will take some time for us to update the offline version.