Ubisoft is giving away a PC game every month for the rest of the year. Before you ask: yes it requires uPlay and joining their Club (which is also free), and no you don't get a Steam code.
Assassin's Creed 3
Prince of Persia: Sands of Time
So I installed Win10 yesterday, everything went fine. Started doing some...optimizing and disabled indexing on my SSD. Apparently Win10 didn't like that, because then it wouldn't return any search results related to the Settings app / Control Panel (e.g. Device Manager).
So I re-enabled...
Alien: Isolation for $12.49, and the Season Pass is $7.49.
Definitely a fantastic game and more than worth the price. Especially if you love the original Alien movie.