Cryo Grenade (Mothership Zeta)

The Cryo Grenade is a type of grenade which is added to Fallout 3 in the Mothership Zeta add-on.

Characteristics
The Cryo grenade deals only one point of damage to targets, but will freeze them solid for 3 seconds. Take that time to get a few easy shots on the foes with a more powerful weapon. Or, use it to freeze an NPC in possession of a unique weapon, then take it from them while they're frozen.

Thrown grenades are affected by physics; they may bounce or roll unexpectedly if not thrown carefully. However, in game physics can also be used to your advantage; such as throwing grenades through doorways or bouncing them around corners to attack enemies who cannot see you.

Grenades can be targeted in V.A.T.S. and can thus be shot out of the air. Shooting them whilst they are still held by the enemy can detonate them as well. Grenades can be thrown point-blank in V.A.T.S due to the sharply reduced damage taken.

A grenade that has been thrown toward you will show up on your HUD as a red arrow denoting its direction relative to you. Move in the opposite direction as quickly as possible to escape the blast radius.

Holding the fire button down for a longer period of time will increase the strength of the throw. Grenades can be thrown for longer distances than normal through successful V.A.T.S. hits. Grenades cannot be cooked to detonate earlier.

It is also possible to plant a live grenade on an NPC by passing one from your inventory to the NPC's inventory via pickpocketing.

Locations
These grenades can be obtained from Elliot Tercorien after releasing him from stasis and going through the Cryo Lab with him. He will pick up some cryogenic parts in the area where Beckett and Daniels are frozen which enables him to start making the grenades upon return to the Engineering Core. He will give you 3 Cryo Grenades and 3 Cryo Mines after you wait an hour for him to make them. After that must wait another 3 hours for him to make 2 more each time you ask. Elliot will not be able to make any more Cryo Grenades or Cryo Mines after he leaves the Engineering Core during "This Galaxy Ain't Big Enough"

Bugs

 * If you are caught in the blast and paralyzed, the frost effect will not appear unless you are in your vault undergarments.
 * Being caught pickpocketing while a cryo grenade is your current weapon (holstered or not) may cause the pickpocketed NPC to fall over as though they were frozen, without the visual effect. Talking to them will bring up their inventory, allowing you to take items from them at will.