Tom Clancy's Rainbow Six Siege is an online tactical shooter. Players must decide if they want to control "attacker" or "defender" in the different gameplay modes such as rescuing a hostage, defusing a bomb, and taking control of an objective within a room. There're also "situations" in the game - an offline missions which can be completed solo. These missions feature a vague narrative that focuses on recruits undergoing training to prepare them for future encounters with the White Masks, a terrorist group that threatens the security of the world.