Par contre j'ai tué celui chez les Twix dans sa cage électrifiée et celui avec la compagnie. Mais parait-il qu'il y en a 3.
Savez-vous où se trouve le 3ème?

GNR
 
    * The Behemoth right outside the entrance to the GNR Building is the easiest to find and is actually impossible to miss if you attempt Galaxy News Radio (quest). You will have ten Brotherhood of Steel members to back you up, though they are not invincible and most will likely be killed quickly. A dead Brotherhood member is in possession of a Fat Man weapon and several Mini Nukes he is laying in front of the fountain in the GNR Plaza; simply pick it up before the fight with the Behemoth. The lamppost in the area is fragile-looking, but the Behemoth considers it a wall, and it can serve as effective cover from the Behemoth. If you have trouble defeating this behemoth it’s possible just to run inside the GNR building. There is a back exit to this building so you will not have to face him on the way out. Also when you quick travel back to this location you will be placed behind the sandbags pretty much out of harms way near the door. Another possible strategy is to take cover under the GNR building, coming out when your AP recharges to use VATS. Yet another strategy is to use the broken down building to the left of the Behemoth's point of entry. If you are inside the building, he will just mill around the plaza, but will start to chase you if you step out of the doorway. You can exploit this by running out, dropping a bottlecap mine, and leading him into it.  
 
    * More hints for defeating this particular behemoth can be found at the Galaxy News Radio page.  
 
    * If you do not need to do the GNR quest (e.g. you went straight to Rivet City), you may find on arrival at GNR the Super Mutant Behemoth will smash down a wall nearby and "break in" to the square, attacking you.  
 
    * If you want to resurrect the behemoth from GNR building for another fight, use ID# 1F1F9 (make sure the roof is high).  
 
    * If you did skip the Following in His Footsteps Quest and have already located your father, you will need to fight all of the Super Mutants alone up until you are in front of GNR. Then a few of the Brotherhood will be fighting the remaining Super Mutants. The Super Mutants will win, leaving only two or three left. As soon as you leave the building you are in, the explosion will trigger and the behemoth will appear. If you retreat to, and stay in the building, you can slowly hurt him because he cannot enter this location. If you find the behemoth in this way, there will be no Fatman or Mini Nukes.  
 
    * If the player learns James's location from Rivet City before heading to GNR, the explosion outside the building initiating the battle will take place, but the Behemoth may not appear.  
 
    * A particularly interesting glitch may happen with Fawkes while fighting the behemoth. If he is killed, the player is to pause the game and quickly load a saved game right before the battle as Fawkes falls to the ground. The charge pack on his back falls to the ground, and he will not be wearing it. His gun may also become invisible. This can be fixed by fast-traveling to any location, telling him to wait, or entering a building. This has not been tested with other enemies. (Xbox 360 version)  
 
    * Occasionally on the Xbox 360 version of the game, the one Brotherhood of Steel may not have the Fat Man, thus making it harder to kill the Behemoth.  
 
[edit] Evergreen Mills
Behemoth in Evergreen Mills meets a Fat Man from the rooftops
Behemoth in Evergreen Mills meets a Fat Man from the rooftops
 
    * In Evergreen Mills, the Raider-controlled train yard, a Behemoth is trapped by an electric fence. When approaching the area from the south, the generator can be easily destroyed with any rifle (it should be noted that there is a switch to turn off the electric fence right next the the generator as well); a melee will ensue in which most of the raiders will die killing the Behemoth. However, no experience will be gained by this method. The easiest method of legitimately defeating the Behemoth is to clear the area of raiders, lay several Bottle Cap Mines near the gate (but far enough away from the generator so they don't detonate when it explodes) and then release the locks on the cage. Alternatively, the Behemoth can be attacked by ranged weapons through the mesh gate while the generator is still active. The roof of the nearby train car offers a clear view of him. However, it is possible that the Behemoth may escape during the player's shootout with the Raiders, forcing the player to deal with him in the tight confines of the camp. Another alternative is to jump between the carriages to get to the other side of the carriages. The Behemoth will try to get through but can't and eventually will run off. Just jump back over and it comes back, repeat until the Behemoth dies. Normally the Behemoth won't attack any followers with this method. Another method is to simply stand on the carriages and shoot the caged Behemoth from a point that means you shoot over the walls. Glitch: If you approach the cage and go into VATS with a frag grenade while the Behemoth is still locked inside there is a chance to send it shooting into the sky which will kill it before it lands.
    * It's also possible to snipe the Behemoth from the cliffs near the entrance to Evergreen Mills. He won't be able to trace the fire back to you and will continue to shuffle around.
    * Sniping the generator from the roof of the foundry provides front row seats to the carnage sure to follow.
    * A glitch might happen where a companion opens the door to the cage while the generator and electric fence are still operating.  
 
[edit] Capitol Building
 
    * A Behemoth can be found in The Capitol Building fighting Talon Company mercenaries at the west entrance. There is a considerable amount of fighting between Super Mutants and Talon Company so it's possible to sit back and watch the fun. You can also find a room next to the dome with the Behemoth containing a computer which, when hacked, will allow you to activate the turret system in the dome. There are several turrets that are activated by this command, so it'll likely make things much more interesting.
    * A very simple tactic for defeating this Behemoth is simply standing just outside the doors leading to the room which he is in. Being that he cannot fit through the doors, and has no projectile weapons, he will simply try his best to back away from the doorway allowing you to injure him from afar. If he gets too far away, simply walk into the room and allow him to run at you, then move back through the doorway when he gets close allowing you to continue hitting him until he dies. You can even have fun taunting him, or killing him with a weak weapon just for kicks
    * It may not always be a good idea to sit back and watch the fun.There is a chance that one of the talon company mercs will have a fat man and kill the behemoth before you get a chance to.)  
 
[edit] Takoma Park
 
    * A Behemoth is located northeast of the Takoma Park in Takoma Industrial. There is a truck near a water tower a few feet away. On the truck you can see a dead mercenary and a switch that activates some artillery that makes the fight much easier. This artillery will fire several times before breaking (you can fix it with a Science skill of 33).
    * A good way to kill this behemoth is to dart into the truck to the right of the gate, approaching from the west through other DC ruins. From inside this truck you can pick off the other Super Mutants and kill the behemoth at your leisure, as he cannot hit you.  
 
    * Although it has not been confirmed to have occurred more than once, rarely, this Super Mutant Behemoth may not attack you (only confirmed on the Xbox 360 version pre-DLC). It won't be frozen, standing idle in the same place with normal animation, but will not take notice to you or any other hostile NPC in the area, even when constantly attacked (not confirmed with followers). It can die and be looted without any further glitches being triggered, and you will still recieve the Achievement for killing it. This glitch is very useful, especially to players who plan to fight it on Very Hard.  
 
    * (Unconfirmed) right when you enter Takoma Park, the first Super Mutant Master you see with a missile launcher may be frozen, it's impossible to hurt him when he is like this, so kill his friends, and just run past him, or save, then load and shoot him. He will most likely drop his missile launcher before his death so he will charge at you instead.  
 
[edit] Jury Street Metro Station
 
    * One final Behemoth is located at a Super Mutant camp, after following a series of search party notes (Unmarked quest: Searching for Cheryl). The final note takes you to a camp between the Jury Street Metro Station and Evergreen Mills. Both are located due west of Vault 101. You do not need to get these notes to make this Behemoth appear. Keep going west from Vault 101 until you find Jury Street Metro Station. Head further west from there until you find a bunch of wrecked train cars along with a few Super Mutants. If you're having trouble finding it follow the tracks heading NE from Evergreen Mills, or you can just look for the train tracks SW of Jury Street Metro (hint: they come out of a tunnel in the hill). On these tracks are several overturned railway carts. One of them is a large empty storage container, with the open part facing the Jury Street Metro area. In this container are several "Cart Cages" (shopping carts pushed together to make a cage). One of these contains a teddy. Open the cart and grab the teddy. While not the only way to make the Behemoth spawn taking the teddy bear will spawn him above the tunnel. When he spawns, the Behemoth may get caught up fighting Talon Company/Regulators (depending on your Karma) near the Jury Street Station. Another good tactic is to get 10 or so Bottlecap Mines, and place them around the area he spawns, to the immediate east of the tunnel, and spawn him by taking his teddy, he will instantly be killed when he spawns, saving you ammo and time.  
 
    * You may encounter the behemoth as a nasty surprise before you are able to spawn him using the teddy. It may be found in the areas near Jocko's Pop & Gas Stop and Smith Casey's Garage. If killed, the behemoth won't spawn when you open the cart.  
 
    * This Behemoth can sometimes be encountered by simply waiting near the cart cage containing the teddy bear. (360)  
 
    * The behemoth might already be spawned without even going near the container, you may find him fighting someone else up the hill.  
 
    * When the teddy is grabbed, the behemoth often will spawn right next to you, which can be deadly for those unprepared.  
 
    * Occasionally if you try to take the behemoth's teddy right before the final quest, he may not appear.  
 
    * In order for the Behemoth to spawn, the teddy must ring until it stops.  
 
    * If using Chinese Stealth Armour to attack the Behemoth after the first hit he may still not attack. If this glitch occurs you may be able to take the Behemoth out without him even attacking, he just wonders around the area near where his Teddy Bear was.

Et l'armure Tesla elle est où ???

on la trouve sur des mecs de l'enclave mais elle n'est pas mieux que la T51b ou encore celle de l'enclave

Faut passer dans la grotte des gosses au nord ouest.