If you like RPG's you can download neverwinter for free for starters (I have it downloaded but haven't started on it yet but I have put many hours into the PC version) and of course The Witcher 3 looks amazing, I've played a bit of it at a friends house not enough to give a review on it but enough to know that I really want it. The Incredible adventures of Van Helsing is free with gold right now and so far it's been pretty good.