By the way, I just fixed sound and it really wanst related to optimus run at all.

Now I got CK 2 running prefectlly, excelent FPS and all

Ive copied the line above:
LD_LIBRARY_PATH=~/Steam/ubuntu12_32:$LD_LIBRARY_PATH optirun ./ck2
although Im not really using ubuntu, but mint

Im not really sure this path is correct, but at the same time, Ive been having quite a bit of sound issues lately, so this is probably not related to optirun.

Anyway, you can add Crusader Kings 2 to the list above

I just tried this method to run Cruzader Kings 2 and it works!!

The games its runs with EXCELENT FPS (I had tried before without optirun and it was unplayable).

The only thing is: now sound is not working, I have no idea why