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 PlayStation 4, Windows, and Xbox One on December 1, 2015; the game was also released for PlayStation 5 and Xbox Series X/S exactly five years later on December 1, 2020. The title received a port for Google Stadia on June 30, 2021, and one for Amazon Luna in January 2022. The game puts heavy emphasis on environmental destruction and cooperation between players. Each player assumes control of an attacker or a defender in different gameplay modes such as rescuing a hostage, defusing a bomb, and taking control of an objective within a room. The title has no campaign but features a series of short, offline missions called, “situations” that can be played solo. These missions have a loose narrative, focusing on recruits going through training to prepare them for future encounters with the “White Masks”, a terrorist group that threatens the safety of the world.