The Game: Tom Clancy's Rainbow Six Siege is an online tactical shooter video game. It was released worldwide for Microsoft Windows, Play Station 4, and Xbox One on December 1, 2015. 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 a capture point. The title has no campaign but features a series of short, offline missions called, "situations" that can be played solo.

Operators are playable characters in Tom Clancy's Rainbow Six Siege. There are currently 54 playable operators (excluding Recruit), all hailing from one of the 24 CTUs in the game, categorized into 2 positions: Attackers (ATK) and Defenders (DEF).