Grenade (Plasma)

Plasma Grenades create a blast of superheated plasma on contact.

Fallout and Fallout 2
A magnetically sealed plasma delivery unit, with detonating explosives. Creates a blast of superheated plasma on contact. Mainly used by the Hubologists and Mercenaries (in random encounters) but also by the Enclave as well. Not recommended to use them against the Enclave soldiers as their Power Armor can absorb like 50-80% damage.

Fallout Tactics
A magnetically sealed plasma delivery unit, with detonating explosives. Creates a blast of superheated plasma on contact.

Fallout 3
A magnetically-sealed plasma delivery unit, with detonating explosives. Creates a blast of superheated plasma on detonation.

Typically carried by Enclave Officers, who use them in combat along with their Plasma Pistol sidearm. Some can be found in the Citadel in a locked cell door (100), along with other weapons. You will not lose karma for taking these items. You can also find a bunch of them after you complete the Operation: Anchorage DLC in the vault. It is more powerful than the frag grenade. If you have the Demolition Expert perk, watch yourself when using plasma grenades or you will end up in a world of pain.