I love both of those, especially the Spiker because that's my fav weapon of all time.
I actually found the older thread for this, but who cares. Here is what I posted on that thread:
*Victim must be in crouched position, assaulter must have some type of precision weapon or pistol, but none that are forerunner.*
Once initiated, the assaulter will knee the victim unbelievably hard in the head, making him/her drop to a 1 arm/ 2 knees touching the ground position. You take whatever weapon you're holding, stick it in their ear, (hard enough to where you actually tilt their head) and blow their brains out from ear to ear. (I'd say this would look best with a pistol, but any precision weapon will work.)
*Assaulter must have shotgun type weapon equipped.*
Assaulter turns the victim around, crouches and puts the barrel of the shotgun into victim's stomach. (The shotgun is pointing upwards towards the sky, but against the victim's belly) When the shotgun fires the victim is flung backwards for a short distance in the air. If it is a forerunner shotgun, the victim disintegrates in the air.
*Gravity Hammer is required for assaulter*
Assaulter kicks victims leg in right behind their knee, and reels back for a hammer strike with the spiked end while the victim lies on the ground on a flat back. The spike breaches the visor, kills the victim, and is then pulled out.
*No requirements*
Assaulter runs up behind victim, jumps, grabs the victim by the head while still in the air, slams their face into the ground, and then stomps on their head. (The first part of this assassination is called a "Bulldog")
*Victim must be a grunt*
Assaulter takes combat knife, stabs the grunt's methane take, pulls his knife out, and watches the grunt fly like a balloon that had the air let out of it.
*1/100th chance of happening, must be against hunter, must have grenade equipped.*
If you've seen Forward Unto Dawn, and Master Chiefs signature move on that Hunter, that's pretty much it.
Yes, I think the assassinations should be a little more gruesome.