if helmets had achievements

i need an idea for some hard achievements or other difficult ways to unlock armor.

for rogue,hayabusa and CQB.
they need creative names and since hayabusa is the one everyone talks about, it needs to have something really hard

Helmet: Hayabusa

Achievment name: Recompense of the Fallen

Requirements: Complete any campaign mission on Legendary, using only a skull as a weapon

Hayabusa:

Achievement: Rights Manager

Requirement: Get the rights to use the Ninja Gaiden player model for 343 Industries

Flaming Recon:

Achievement: Finish the entire campaign using the assault rifle and pisol.

Helmet: Hayabusa

Achievement: Few are chosen…

Requirement: Complete a Mission LASO by only melee kills.

OR
Requirement: Finish 1st in a rank rumble pit match by only melee

Armor

Achievement: …Even few chose

Requirement: Complete ALL missions Melee only LASO

Melee because it is a sword on your back

What is this? What is that?
Complete an entire mission on Legendary with Thunderstorm and Mythic skulls using only Plasma Weapons (needle weapons don’t count)
Unlocks. Hayabusa Shoulder pieces

I Wield the Honor of My Foe
Clear a mission on Heroic or Harder with an energy sword with 80% charge or more
Hayabusa Chest piece

Shall Thereby be the Sweeter
Carry the Skull through insert mission name and hold it as the cut scene begins
Hayabusa Helmet

No Greater Heresy
In insert mission name, kill all allies encountered in the mission
Rogue Helmet
Here’s the twist, you play as Locke for this one

Orthodontist
Melee all Elites throughout the a mission on Heroic or harder
CQB helmet

Gunna need braces
Melee all Jackels throughout the a mission on Heroic or harder
CQB Shoulders

Dentistry
Melee all Grunts throughout the a mission on Heroic or harder
CQB chest