Mysterious Stranger/Fallout 2

Mysterious Stranger is a perk in Fallout 2.

Effect
The perk only applies to hostile random encounters. The perk activates a variable that allows the Mysterious Stranger, a leveled friendly leather jacket wearing man or woman (same gender as the player's character), will spawn to assist in combat. The chance is determined as follows:
 * $$\text{Chance of appearance }%=30+(2\times\text{Luck})$$

Once the fighting ends, the stranger will remain on the map, but they are a poor conversation partner. If killed, the Stranger will not appear again. The perk is functionally pointless, as the Stranger either doesn't make a difference in easy encounters or dies too easy in late game encounters.


 * Statistics


 * Weapons


 * The Mysterious Stranger does not have the correct ammo when they spawn with the hunting rifle (shotgun shells instead of .223 FMJ), giving them only 10 shots before they run dry (i.e. the magazine in the rifle).
 * Saving and reloading during a random encounter will break the Stranger's script, freezing them in place.

Behind the scenes

 * The Mysterious Stranger perk was originally designed by Scott Bennie.
 * The Mysterious Stranger in Fallout 3 and Fallout: New Vegas wears a fedora and overcoat, like the protagonists of 1950s film noir.