The latest entry in the Tom Clancy's franchise, The Division, will be free to play on PC this weekend. The event is beginning on 10 AM PST, December 15. It'll be available for free only for 3 days, meaning the event will end on December 18. Preloading is already underway at Uplay. So you better hurry and start downloading to make sure you don't lose your play time downloading the game.
Only the base game (with every content updates) is eligible for this, DLC is not included.
And oh yeah, The Division is currently on sale at Uplay for $25. And if you decide to buy the game after this free event, you'll be able to carry over your progress.