Tom Clancy's Rainbow Six Siege offers dozens of different Operators to choose from, each hailing from multiple Counter-Terrorist Units from across the world. Only one Operator may be chosen from each specialty per round and cannot be changed until the round is over. Each Operator features a selection of different weapons, abilities, and equipment. Customization items, such as weapon skins and Operators themselves are obtained through earning and spending renown (in game money).
Matches are a 5v5, with each player only receiving one life per round. As such, it is extremely important to communicate with teammates and plan assaults when attacking or defense when defending. Attackers start each round with 45 seconds to send a Drone to survey and detect items in the environment, allowing players to find enemies and targets and mark them. Defenders, on the other hand, have the ability to fortify their location and prepare for the inevitable assault by the Attackers. This is done through setting up Reinforced Walls and Barricade around the area as well as deploying unique abilities to help defend the area.