Tom Clancy's Rainbow Six: Vegas is the fifth game in the Rainbow Six series of video games. It changes the series with multiple new features, such as a new health system where the player regenerates health while not taking fire (it should be noted that the player may sometimes be killed instantly, without a chance to regenerate health; this usually happens from grenades, as well as taking close range fire from very powerful weapons, particularly to the head). The player's vision is greatly impaired while damaged, similar to the health system in Gears of War.