Tom Clancy's Rainbow Six is a tactical shooter video game series developed by Red Storm Entertainment and published by Ubisoft. The series is inspired by Tom Clancy's novel of the same name, focusing on counter-terrorism operations. The gameplay emphasizes strategy, tactics, and teamwork, offering a realistic approach to military operations. The series has evolved with various installments, including Rainbow Six Siege, which gained popularity for its online multiplayer gameplay. The original Rainbow Six game was released in 1998.