Energy weapons in Fallout 4 are one of the types of weapons in the game that operate on electric batteries or nuclear micro-reactors. Previously, we've already discussed the best pistols, rifles, melee, and unarmed weapons, and now let's delve deeper into energy weapons. 

This top includes the best legendary energy guns in Fallout 4 that you can find in the open world: buy from traders, obtain for defeating enemies, or completing quest chains. 

Alien Blaster Pistol and Hub's Alien Blaster

Alien Blaster Pistol is an energy pistol with a large magazine. Its pros include high rate of fire. You can get the pistol upon reaching level 20 of experience after witnessing a UFO crash. By default, the location won't be marked on the map, but you can refer to the screenshot for guidance. 

Near the crash site, there's a cave with a distinctive dark passage - head straight into it. 

Inside, you'll find an alien on the brink of death after the crash. Deal with it and loot the corpse to get the pistol.

The gun has a slight downside - its unique ammo which it uses. You can't craft or find them in the open world. But if you invest in the Science perk to level 4, you can replace the Alien Blaster ammo with regular nuclear ones. This solves the problem.

Hub's Alien Blaster is the legendary version of the Alien Blaster, which looks exactly the same. You can only find it with the Nuka-World add-on. It's more suitable for players who play in V.A.T.S. mode. Reason: a special legendary property, which doubles critical hit damage and increases critical hit meter filling speed by 15%.

You can obtain the blaster at the Hubologist's camp as a reward for completing the "Trip to the Stars" quest.

Survivor's Special

Survivor's Special - a weapon with the legendary property Bloodied. The essence is that this ability is unavailable for guns and only drops on melee weapons. The uniqueness of the Survivor's Special lies in the fact that it has a legendary property unavailable for this type of weapon. 

The Bloodied property works simply: the lower your health, the more damage you deal. 

Righteous Authority 

Righteous Authority is suitable for players who play in V.A.T.S. mode. The legendary property of the gun is identical to the Hub's Alien Blaster, doubling critical hit damage. 

You can obtain the gun by completing the quest "Call to Arms" for helping Paladin Danse. 

Old Faithful and Protectron’s Gaze - guns from the same category as Righteous Authority, but with some differences. Old Faithful is more suitable for snipers due to the legendary property Instigating. This means that the gun deals double damage to a target with full HP. 

You can buy Old Faithful in Diamond City from Arturo Rodriguez. 

Protectron’s Gaze shoots weakly but accurately and far. It can be used similarly to a regular rifle - it's the best and most effective way to use it. 

You can loot Protectron’s Gaze from the body of a dead Mechanist.

Prototype UP77 Unlimited Potential

Prototype UP77 "Limitless Potential" visually resembles the previous three legendary guns. Its distinctive feature is a special legendary property that provides unlimited ammo capacity.

Some players mistakenly assume that the Limitless Potential has an infinite supply of bullets. Unfortunately, this is not the case. Such a property would be too unbalanced, so all you get is an unlimited magazine capacity. That is, it's unlimited in terms of magazine capacity, not ammo.

There's not massive damage here, but due to the lack of frequent reloading, you'll save time and quickly dispatch enemies with relentless damage.

Sentinel's Plasmacaster

Sentinel's Plasmacaster deals energy and physical damage by using plasma as ammunition. 

You can purchase it from Proctor Teagan on The Prydwen provided that you side with the Brotherhood of Steel and destroy the Institute. The gun deals double damage to a target with full health.

Experiment 18-A

Experiment 18-A is another plasma legendary with increased rate of fire and reloading speed. It visually resembles the Sentinel's Plasmacaster. In terms of combat power, they are practically identical. 

You can buy Experiment 18-A from a Synth requisition officer at the Institute.

Final Judgment and Aeternus

Final Judgment and Aeternus look identical, like several other guns in the top. This energy weapon can rightfully be considered its leader.

You can obtain Final Judgment during the quest "Airship Down" while playing for the Institute. During the quest, you need to kill Elder Maxson and loot the gun from his corpse. 

The legendary property of Final Judgment increases rate of fire by 25% and reduces reload time by 15%. And this is one of the best characteristics that energy weapons in Fallout 4 can possess.

Aeternus is visually identical to the gun, but with a different legendary property. Here, you get truly unlimited ammo. And this time, we're not being deceived. The number of rounds is truly infinite, though obtaining this gun is exponentially more difficult. One of the advantages is that you don't have to go through the Institute's questline, which is required to obtain Final Judgment. 

Aeternus is wielded by a renegade knight at the "Nuka-World" Cola-cars arena. You can encounter the opponent during the quest "Amoral Combat". 

These are the best and most interesting legendary energy weapons in Fallout 4. They are all powerful, so pay attention to the #h7" target="_blank">legendary properties and choose the ones that best suit your play style.