Hmm...
Flood Assassinations:
1. Flood infected Spartan-IV sprints toward player, jabs the flood talon through the abdomen, and raises the arm splitting the victim in half
2. Flood infection form sprints toward the player, does a crouching slide and cuts their head off. (Much like a Halo: Reach spartan on elite assassination.)
Spartan Assassinations:
1. [Flag Kill] Spartan sprints toward player with flag in hand and stabs it through their head, kicks them backwards and regains his/her flag
2. [Oddball Kill] Spartan takes the oddball and throws it with a lot of power at another player, causing the ball to shatter against the helmet, if timed right, a teammate or yourself can then go in and stomp the stunned opponents head into the ground
3. [Vehicular Assassination] Spartan boards enemy vehicle, grabs the driver or passenger and tosses them under the wheels causing the to die of vehicular manslaughter.
4. [Vehicular Assassination Counter] Spartan attempts to high-jack the driver or passenger, if timed right you can click a button combo to fight back and kick them off into the dust.
5. [Vehicular Assassination Counter] Spartan attempts to high-jack the gunner, if timed right a specific button combo can cause the gunner to grab the enemy and stick them to the end of the turret while the gunner will proceed to shoot the enemy. (May jam any turrets)
6. [Vehicular Assassination] Enemy boards gunner section of Warthog and takes the turret and spins it at a high speed, getting a hit on the spartan's abdomen causing major bleeding, then death.
7. [Mag-sassination!!] Spartan-IV has gained enough fury (I'll explain fury in a second) in the match to be able to take the Magnum in the melee style that was new in Reach (The one with the melee and flip back) and thrust the weapon into the back of the helmet, puncturing their skull and leaving massive to fatal damage.
~~~~FURY~~~~
Fury is a new type of system that I created to give Spartan-IV's that have some anger issues the ability to let loose. Fury is built up when a near ally's death occurs that you could've saved or seeing an ally get assassinated, so on. The fury bar when full will give the player a three hit melee damage boost. This will allow players to use their own weapons - ones even without blades to puncture the armor and possibly kill them.
Although the system has a hint of overpower within itself, it still gives the victim a chance to retaliate since on most occasions the hit will only badly injure them. The third melee strike will have the most damage, being the "final blow" of them all. The final blow attacks will kill the enemy once in contact with the weapon. If the enemy does survive a final blow attack, they are rewarded with a medal called "Shrink", as they have survived the worst blow of the man/woman with fury at the full.
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Spartan Assassinations [Continued]:
8. [spik-sassination!!] The spartan takes a Spiker, runs up to an enemy and holds them up by their neck. He/she then smashed the spikes on the Spiker into the enemies visor, causing blindness if survived, or even death death if the spikes went far enough into the head to hit the brain.
9. [Needler Assassination] Spartan pulls out the last remaining needle in the needler and sneaks up behind an enemy and begins to rapidly start stabbing at the neck until the enemy is dead.
~~~~Hand-to-Hand-Combat~~~~
So, we've all seen it in rumors for Halo 4. But all we got a was a few quick-time events in the campaign. And what are Spartan-IV's to do when they run out of ammo? Spartans are not always dependent on weapons. As William-043 had taken on two hunters in hand to hand combat and killed one of them, and saved his fellow spartans. The Spartan-IV's are stronger than Spartan-III's, so they have more power and a better pain tolerance. They could take massive blows and get up unharmed.
We always run out of ammo, so instead of scavenging how about we have a choice to throw our weapons down and use our fists? It's not hard to use, LT/RT to punch, LB/RB to block. It isn't the worst concept. And although it keeps you vulnerable, it is better to go out in a blaze of fury with your hands rather than with a gun you can barely keep in your own control, right?