Tesla Cannon (Fallout 3)

The Tesla cannon is a shoulder-mounted, non-recoil energy weapon that fires powerful blasts of electricity. It is powered by electron charge packs. It is likely based on designs confiscated by the US Government after the death of Nikola Tesla.

The quest line of Broken Steel includes having to find a Tesla coil for this weapon in order to help the Brotherhood of Steel build it.

Locations
There are a total of 13 Tesla cannons, or 14 if you count the Beta Tesla cannon, but only a maximum of 11 (12 with Beta Tesla cannon) can be obtained in one play-through.


 * The first Tesla cannon can be acquired upon your initial arrival at Adams Air Force Base. There will be a resupply crate directly to your left near the wall upon exiting the Presidential Metro.


 * Once you leave Adams Air Force Base, if you did not blow up the Citadel and return there, 2 Tesla cannons can be found in the Citadel Lab after finishing the quest Who Dares Wins, on a table in front of Liberty Prime's docking bay.


 * If you blew up the Citadel, you can find 2 Tesla cannons in the Citadel armory. If you did not blow up the Citadel you can't get into the armory.


 * If you return to Adams Air Force Base after Who Dares Wins, you can acquire 8 more Tesla cannons (4 in perfect condition, 4 in poor condition).
 * The first pair are before you reach the hangars. Traveling northeast from the Adams Air Force Base Entrance towards the hangars, the 4th open-topped military truck in your path has a resupply crate in the back with a good and poor condition weapon and EC packs.
 * The second pair of cannons (along with some EC packs) is in a resupply crate between the first and second hangar on the way toward the Mobile Base Crawler by the base of an Enclave barricade. To be clear, these two hangars are to your right once you reach the airfield portion of your base, near 2 parked Vertibirds.
 * The third pair are in a resupply crate by the ramp leading to the covered catwalk between the second and third hangar on the way to the Mobile Base Crawler.
 * The fourth pair are at the base of an Enclave barricade, between the Mobile Base Crawler and the Air Control Tower.
 * There is another Tesla cannon that can be found outside of the map during the Death From Above quest. It is similar in appearance to the missile launcher and is a beta version of the Tesla cannon. It is not considered to be a unique weapon because it was originally cut from the game.

Appearances
The was added to Fallout 3 in the Broken Steel add-on. It was going to appear in Fallout: Brotherhood of Steel 2, which was canceled by Interplay.

Bugs

 * If you kill an enemy with the splash damage effect alone, you may not earn XP for the kill, but you can use this to your advantage. If a good character is killed by the shock damage after effects it will result in no karma loss or hostility from nearby NPC's. You will also not receive any fingers or ears for enemies killed by the cannon's splash damage.
 * Also in some cases the gun will disappear from your hand and reappear on the floor, only in third person. It will not follow the direction of your crosshair but the direction it is facing on the floor.
 * PC: The Tesla cannon will not destroy a VB-02 Vertibird in a single shot, unlike the console versions of the game.

Behind the scenes

 * The Tesla cannon was also to be featured in the canceled Fallout: Brotherhood of Steel 2, bearing a striking resemblance to the weapon in Broken Steel. Described as a "high-powered mass-cannon throwing tessellated plasma forward in an orgy of death and destruction" in the FO:BOS2 design document, it was to be the so-called "uber-weapon" of player character Maxus. "Uber-weapons" were to be unique weapons for each PC which had to be assembled from 5 parts over the course of the game. One of the five parts for this weapon was a Tesla coil.
 * Nikola Tesla really did try to create a directed energy weapon but it would have been a particle beam weapon called a "Teleforce", something that would be immensely complicated to create (laser weapons would be simple by comparison) and is a type of weapon that is not even mentioned in Fallout 3 (possibly the entire series). Simply put, a particle weapon accelerates atoms or electrons at extremely high velocity (at relativistic speeds) to damage a target.