Gas grenades first appeared in IVAN CVS, and can be found containing either mustard gas, skunk smell, or raw magic.

LIVAN increased the power of dwarven gas grenades exponentially, giving rise to a new exploit.

The way the gas grenade spawns its gas cloud assigns no blame to the player, meaning that any damage caused by a gas cloud to a friendly or neutral NPC is not attributed to the player and does not turn the NPC hostile.