system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars: The Force Unleashed] What made Starkiller so powerful?

The guy was able to kill numerous powerful opponents, such as: Darth Vader, Darth Sidious, Shaak Ti, Boba Fett and etc..

Him beating Ti and Boba I can buy, but Vader and the Emperor? 

How????

Also, let's not forget he literally was able to use the force to destroy a goddamn Imperial Star Destroyer.

What even is this guy?
gpt
I don’t know if there is an explicit, in-universe answer that explains it, but I’ll posit a few theories:

- He is the son of a Jedi master. The Skywalkers have numbed people to this fact, but that’s exceedingly rare. Remember, most Jedi don’t breed. That gave Starkiller a genetic advantage.
- He was trained by the literal chosen one from childhood. 
- He then received training from Rahm Kota afterward. This made him well-versed in both the light and dark sides of the force, but in the opposite order of most Sith. Typically, a Jedi starts in the light and then falls, losing touch with the light and embracing the darkness. But by starting with the dark side and then slowly getting lighter, he gets the best of both worlds: the emotion of the dark and the restraint of the light.