Gas grenade

A gas grenade is a type of UNSC grenade designed to incapacitate an enemy by releasing irritating fumes into a vicinity. Depending on the gas used, a gas grenade could be non-lethal or pose a serious inhalation hazard. It differed from a smoke grenade in that the former was meant to impede respiration, while the latter was designed to alter visibility.

List of appearances

 * Halo: Tales from Slipspace
 * Undefeated