Tom Clancy's Rainbow Six Siege is an online tactical shooter video game developed by Ubisoft Montreal and published by Ubisoft. It was released worldwide for Microsoft Windows, PlayStation 4, and Xbox One on December 1, 2015. The game was also released for PlayStation 5 and Xbox Series X and Series S.
See also: Rainbow Six, Rainbow Six (novel), Tom Clancy's Rainbow Six, Tom Clancy's Rainbow Six Extraction, Tom Clancy's Rainbow Six 3: Raven Shield, Tom Clancy's Rainbow Six (video game),