Got a PC and a Ubisoft account? Good news then, as Ubisoft has announced that it's giving away two more games for free as part of its Ubisoft Play Days promotion in the shape of PC RTS World of Conflict and one of the best entries in the Assassin's Creed series, Black Flag.

Following on from last month's giveaway of Watch Dogs, from now through until December 11 you'll be able to get a hold of World in Conflict and expansion pack for no charge to mark the game's tenth anniversary.

Then, from December 11 through December 18 the deal will change to a free copy of stellar pirate-themed adventure (and probably the best AC game before this year's Origins) Assassin's Creed IV Black Flag to mark that series' own tenth anniversary.

All you have to do is sign up for an Ubisoft account (or log into an existing one) at this link for your free game. Bear in mind the page will change when the deal changes to Black Flag, so you'll have to head back there when that happens, but you will be able to keep the games forever when you do.