Rainbow Six Siege has been delayed to December 1, 2015, Ubisoft has announced.
The game had previously been due to release on October 13. The closed beta is still due to begin on September 24, as previously planned.
"This wasn't an easy decision," said Ubisoft, "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. We're taking a little more time to make these changes, and we think it's the right call."
The revised release date means that Rainbow Six Siege will now release after all of this year's major first-person shooters. The game had previously been due to arrive ahead of Call of Duty: Black Ops 3, Star Wars: Battlefront and Halo 5: Guardians, which are all due to launch in October and November.
"We understand that many of you are excited to get your hands on the final game, but as gamers ourselves we know that quality comes first and we are committed to delivering the best game possible," Ubisoft added.