It looks like you won’t be playing Rainbow Six Siege until the end of the year. Ubisoft has recently announced that the release date for the game has been pushed back to December 1 , 2015, back from October.
“Whether it’s been through playtests in our studios, the closed alpha, or recent hands-on demos at events like E3 or Gamescom, player feedback has been essential to the development of Rainbow Six Siege,” the studio said. “Getting the game in people’s hands and listening to what they have to say helps us understand how we can improve their experience, and we’d like to thank everyone who’s taken part in the process so far.”
“This wasn’t an easy decision, but based on the feedback we’ve received, and based on our own internal tests, we felt there are adjustments and improvements we can make, including improving the co-op experience across all game modes, weapon and gadget balancing, as well as menu and interface navigation,” Ubisoft said. “We’re taking a little more time to make these changes, and we think it’s the right call.”
Source: Ubisoft Blog