Mysterious Stranger

Mysterious Stranger is a Perk in Fallout, Fallout 2, Fallout 3, and Fallout: New Vegas.

Fallout and Fallout 2
With this Perk, there is a chance (30% + (2x Luck)) that your character will gain a temporary ally only in random encounters, details depend on the player's level.

Armor

 * 9-14: 50 HP (52 HP if stranger is female), Leather armor.
 * 15-18: 70 HP, Combat leather jacket.
 * 19-22: 90 HP, Metal armor.
 * 23-26: 110 HP, Combat armor.
 * 27-29: 130 HP, Power armor.

Weapon

 * 9-13: Hunting rifle or FN FAL.
 * 14-19: Assault rifle or Combat shotgun.
 * 20-26: Laser rifle or H&K CAWS.
 * 27-29: H&K G11.

Bugs

 * The Mysterious Stranger with the Hunting Rifle actually spawns Shotgun Shells as ammo instead of .223 FMJ. As such, the stranger only has 10 shots (which are spawned inside the weapon).

Fallout 3 and Fallout: New Vegas
With this Perk, you've gained your own personal guardian angel... armed with a fully loaded .44 Magnum. The Mysterious Stranger will appear occasionally in V.A.T.S. mode to lend a hand, with deadly efficiency.

His magnum deals exactly 9001 damage per shot and will kill any enemy in one hit, including Super Mutant Behemoths. Regardless, he will still empty six shots into a chosen target.

Bugs

 * The Stranger can often fail to kill a character or creature if they are positioned unfavorably (i.e. in an attempt to assassinate an enemy he can easily fall off a bridge or cliff or get stuck outside a building) - which usually results in him running around aimlessly for a while until V.A.T.S. ends).
 * During V.A.T.S., it isn't uncommon to hear the Mysterious Stranger music, even if he does not appear. This most likely happens at times when he would have appeared to finish off your enemy, but you killed the enemy instead.
 * If you are attacking a swimming enemy (Mirelurks, for example) and the Stranger appears, he will fall into the water with the enemy and will swim in place, unable to attack because he is in water.
 * Sometimes when the Mysterious Stranger appears, he doesn't shoot. He'll just stand there, leaving you helpless. Another variant causes the Stranger to reload his magnum for the duration of his attack. If it jams, he may not attack at all.
 * When you enter V.A.T.S. it will be the slow motion scene as usual, but for some reason you get stuck in it once you're done shooting. The enemies and your followers (if you have any) will keep fighting each other but you can't leave V.A.T.S. This probably happens when the Mysterious Stranger is to appear, and for some reason he didn't.
 * While in the Operation: Anchorage simulation, the Mysterious Stranger will sometimes appear and then ragdoll, you will then receive a message that the Mysterious Stranger is unconscious. When V.A.T.S. ends, gameplay will resume as normal.
 * The Mysterious Stranger will bug and be stuck inside walls or even filing cabinets rarely if you are on a certain point of view and small rooms in V.A.T.S.
 * It is possible to injure the Mysterious Stranger by using weapons that deal area damage from grenades to large cannons such as the Tesla Cannon, Fat Man, or Experimental MIRV. It will just give captions such as "Mysterious Stranger right leg crippled" or "Mysterious Stranger is unconscious."
 * At times The Mysterious Stranger will aid you during V.A.T.S., but there will be a 5-10 second delay between killing the target and returning to normal gameplay. This can pose problems when fighting multiple enemies, as they will continue to attack both you and your companions during the delay.
 * It is possible for the Mysterious Stranger to kill you if he spawns at a bad angle or you are at a bad angle with an enemy.
 * There is a common glitch where, when the "Mysterious Stranger" appears in V.A.T.S. you will not be able to exit V.A.T.S. for some time (usually about 15 seconds) and with no control whatsoever. This often causes the player to be low on health when they exit V.A.T.S. and will need a quick health-up.

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.
 * The fact that he does 9001 damage per shot may be a reference to the meme "Over 9000".

Gallery
Tajemniczy Nieznajomy (postać) Таинственный незнакомец