Ubisoft has been teasing the new co-op mode, Outbreak, for Rainbow Six: Siege for a while now. We have yet to get a good glimpse of the action and even with this brand new trailer details are still a little blurry. What we do know is that Outbreak has copied Left 4 Dead in terms of gameplay, which means that you will get missions with certain objectives that you have to complete and you could get attacked by monsters at any time. There will also be a safe house and the enemies will vary from brutes to fast-moving smaller foes.
You can use any operators from Rainbow Six: Sieges multiplayer and you can expect plenty of enemies on screen at the same time. Not long to wait now before the timed event kicks off on March 6th so you might as well start putting your monster slaying squad together now.