The Stim-Gas Grenade, or Stim Grenade, is a healing grenade that releases a blue cloud of gas that has the ability to heal or revive teammates for a short period of time. Only gibbing attacks, such as Frag Grenades and close range shotgun kills, or headshots will kill a player standing in the stim cloud. In other Versus modes that allow stim grenades, the gas cloud dissipates much earlier than in campaign or OverRun/Survival. Also, a stim grenade thrown by a player on the red team will release a red cloud, making it easy to differentiate between friendly and enemy stim gas.