Darth Vader did a lot of killing throughout the course of the first six Star Wars episodes. A new video from Mr. Sunday Movies called "Darth Vader Movie Kill Count Supercut" is gaining some viral traction, showcasing each Vader (and Anakin Skywalker) killing from A New Hope through Revenge of the Sith.
The video is presented in its own little narrative fashion, which includes Darth Vader watching his kills on a screen. I won't spoil the ending for you.
Darth Vader isn't quite up there with Jason Voorhees or anything, when it comes to body count, but the video serves to show you just how much damage he did inflict.
The same channel is also responsible for kill count videos for Superman and Batman.