Tom Clancy's Rainbow Six is a 1998 tactical shooter video game. It is the first installment in the Rainbow Six series. Based on the Tom Clancy novel of the same name, the game follows Rainbow, a secret international counterterrorist organization, and the conspiracy they unravel as they handle a seemingly random spike in terrorism. Characters are affected by realistic factors and can be killed with a single bullet; therefore, wise tactics and planning are encouraged to complete missions over sheer force and firepower.