All drivers updated, same errors... :/
Oh boy... this is so embarrassing :(.
But no problem. I'll try to fix it as soon as possible. I'll leave another reply once the things are done.
Thank you for your time, CoalFire ;)
Allright, i've fixed the problem. Solution is pretty dumb, inherent to most Radeon cards, but it works
Get the patch "smintheus-beta-patch-radeonfix.rar" from here or re-download the whole game.
Have a great day! :)