As I reinstalled this game after quite some time in the dark i played the first 5 mins with no problems.
I had to restart computer because of soundcard crash. It happends from time to time, no biggie, had to reboot computer.
I started Unepic again and met with a decolored screen and super low fps.. could almost not move the mouse to hit Exit.
The sound was normal, but the screen was a mess!

Anyone had the same and got around it?

Thanks for your help!
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Problem solved! Updated my gfx drivers. Nvidia got new ones out 15th of November for gtx 970.