It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like:Chrome,Firefox,Internet Explorer orOpera

Is it possible to play the Witcher 2 with the PS4 controller without downloading third party software? It seems to work fine with a Xbox 360 controller, but I'm not a fan of that controller. I've had no problems using the Ps4 controller in other games but that has been through Steam.