You can play Rainbow Six: Siege free this weekend; here’s how

Sadly, the program only involves PC players

Ubisoft is holding a special “Referrer a Friend” program for their latest game Rainbow Six: Siege; anyone who already owns Rainbow Six: Siege will be given 4 codes that will grant their friends full access to the game.
 
Unfortunately, this program is only being held for the PC platform. To receive your free codes, click here. The free access starts today, December 18th and will run until Monday, December 21st. If your friend gives you a code or vice versa, you can start downloading the game right now, although you won’t be able to play until 6:01 pm EST.
 
Besides that fact that you will let some of your friends play a brand new game for free this weekend, there has also been some incentive added for both you and  your friends. Each referral code that is activated, a total of 4, will grant you a 24 hour XP boost; the XP boost will be activated once the free weekend ends.
 
And for the new players who use the referral code, they will be offered a special 25% discount off the full game on PC. In addition, all the progression that you make this weekend will be carried over to the full game.