Fallout: New Vegas Gun Guide - Pulse Gun
While people were not worried about pulse damage going away as the venerable robot killing pulse grenade has always been around, the absence of a pulse firearm in Fallout 3 and with so many robots and power armored soldiers around you is worrying. Luckily come Fallout New Vegas the Pulse Gun arrives to explicitly bring the power armored faction to its knees and allow the Courier to kill them easily. Sadly the use cases for this weapon are minimal and it won't find itself helping in most battlefields in the base game. However in Tale of Two Wastelands it is king.