It’s the holiday season and as usual Ubisoft is pulling out all the stocks to celebrate. This year gamers will get the chance to add World in Conflict and Assassin’s Creed Black Flag to their Uplay PC library for free.

The first game, World in Conflict, is a real-time strategy game from Ubisoft that is celebrating its 10 year anniversary. World in Conflict is available right now on Uplay PC, so fire it up and add it to your collection for free from now until December 11. The game will also include the expansion: Soviet Assault.

Assassin’s Creed is also celebrating its 10 year anniversary, and Ubisoft has decided to reward fans with a free copy of the critically acclaimed fourth game in the series: Assassin’s Creed Black Flag. This one will be available once World in Conflict is no longer free, from December 12 until December 18 so mark your calendar because many fans call Black Flag the best in the franchise.

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.

In Assassin’s Creed 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.

Assassin’s Creed Black Flag launched on in October 2013 for PC and several platforms, while World in Conflict was originally released in September 2007 for Windows PC, Xbox 360 and PlayStation 3.