You do realize that it may not be the drivers or AMD's fault, but could very well be the game's fault because the game does not support windows 8.1?
It's interesting how people instantly throw darts at AMD for their games not working, or because of glitches, problems, and expect AMD to fix it in the drivers, even though the actual problem is the game it's self.
A great example is Diablo III.. It use to support crossfire, use to work, last few patches it has only worked on 1 card, no crossfire. is that AMD's Fault? NOPE! Blizzard broke it, it's not AMD's responsibility to fix it.
To me it's like someone filling up their car with bad gas, then calling Ford, Chevy, or some other automobile manufacture and telling them to fix their damn engine, even though the problem is not cause by them.
Same thing happens here with games in some cases. IT isn't always AMD's or their drivers fault.