“The Energy Weapons skill determines your effectiveness with any weapon that uses small energy cells, micro fusion cells, electron charge packs, or flamer fuel as ammunition.”— In-game description, Fallout: New Vegas
Example: A starting Perception of 5 and Luck of 5.
In Fallout: New Vegas, energy weapons are more distinct. Lasers tend to have fast firing, accurate beams and lower damage, while plasma has a slow moving yet powerful projectile.
“Energy Weapons is the skill to use any time you fire energy-based firearms like laser guns, plasma guns, gauss weaponry, and any other small arm that fires a bolt of energy.”— Fallout 2d20 Rulebook p.45
Energy Weapons is paired by default with the Perception attribute. However, depending on the context of the action, use of Intelligence or Agility is also permitted, such as using intellect to improve an energy weapon, or using agile maneuvers to disarm energy traps.
Notable Energy Weapons skilled non-player characters
Lieutenant (92%), high commander of the Mutant Army and right hand of the Master.
Vincent (99%), guardian of LA Vault's scientists and in charge of psykers in LA Vault.