This is how Gould, Megatron, and Sentinel Prime's deaths goes in Weekenders Adventures of Transformers: Dark of the Moon.
[Optimus goes after Sentinel and fights him]
Sentinel: Always the bravest of us.
[Optimus continues to fight Sentinel Prime]
Sentinel: But you could never make the hard decisions!
Sentinel: Now! Our planet will survive.
[Sentinel cut Optimus' right arm off]
Sentinel: We were Gods once. All of us. But here,...
Sentinel: They'll only be one.
[As Sentinel is about to kill Optimus, Megatron attacks him]
Megatron: THIS IS MY PLANET!!
Gould: I just saved a whole other world. You think you're a hero? Huh? You think you're a hero?!
Sam: No, I was just a messager. RAAAAAH!!!
Soldier #1: It's still connected.
Soldier #2: B!
Soldier #3: Get going, get going.
Soldier #2: Let's move it.
Soldier #1: Oh it's still connected.
Ratchet: Lets lock it that.
Megatron: We need a truce. All I want is to be back in charge. Besides... who would you be without me, Prime?
Optimus: Time to find out. [kills Megatron then turns to Sentinel]
Sentinel Prime: Optimus... All I've ever wanted... was the survival of our race. You must see why I had to betray you. [Optimus picks up Megatron's gun]
Optimus: You didn't betray me. [cocks the gun and points it at Sentinel] You betrayed yourself.
Sentinel Prime: [realizing what's about to happen] NO, OPTIMUS! [Optimus shoots Sentinel in the back, flipping him over then shoots him in the head, killing Sentinel. Optimus drops the gun in disgust]