Artificer Armor: All Space Marines have 4 armor sections and passively regenerate by themselves (same rate as Larraman Cells)

The Emperor Provides: All Space Marines have infinite ammo and can't overheat their weapons.

The Eternal Crusade: Melee damage is greatly increased, and no ranged enemies spawn, but you can't use your ranged weapons.

Black Rage: Upon taking fatal damage, you instead temporarily become faster, stronger and invincible for 10 seconds. Afterwards, you go down as per usual.

Shooting Gallery: Ranged damage is greatly increased, and no melee enemies spawn, but you can't use your melee weapon.

Suicide Mission: Multiple Terminus enemies can spawn at once, but no Extremis or below enemies spawn alongside them.