Tom Clancy's Rainbow Six is a video game franchise created by Ubisoft and based on the 1998 novel Rainbow Six by American novelist Tom Clancy. The games and the franchise focus around "Rainbow," a fictional international counter-terrorist unit.
Team Rainbow is a global counter-terrorism task force made up of counter-terrorism experts from all across the world. During terrorist crises, Team Rainbow is dispatched with cutting-edge weapons. Rainbow is brought in when all other attempts have failed to rescue the lives of innocent people. Terror is not a bargaining chip for them. They obliterate it.
The team consists of the best of the best from all around the world, and you are one of them. You begin by rescuing hostages from terrorists, but as time goes on, you realize there are greater stakes.