You can grab the games via the company's Uplay store. World in Conflict is a pretty great RTS that was launched ten years ago, Ubisoft even includes the Soviet Assault expansion pack. This game download is offered for free from December 4 to December 11.
After that, Ubisoft will offer Assassin’s Creed IV Black Flag for free from December 12 through December 18.
Developed by Ubisoft Massive, World in Conflict is an RTS set in an alternative history in which the Soviet Union invades the United States in the late 1980s. You play the role of an American commander tasked with marshaling air and ground units in skirmishes ranging across the U.S. (and into the U.S.S.R. in the Soviet Assault expansion). Learn the strengths and weaknesses of your armies, then leverage them as you wage war on destructible battlefields in the solo campaign or in online multiplayer.You can find details on how to obtain the free games at Ubisoft's blog. Definitely a very nice holiday gift from Ubi!
In Assassin’s Creed IV Black Flag, you are Edward Kenway, a pirate out to make a name for himself on the tumultuous Caribbean seas by sailing your ship among the isles in search of plunder, attacking enemy vessels, and diving below the waves for lost treasures. Become embroiled in the conflicts of the era and discover your connection to the series’ age-old struggle between the Assassins and the Templars.