Unlock all other achievements.
Unlock All Collectables.
Unlock a Collectable.
Complete the campaign on Easy difficulty or higher.
Complete the campaign on Inferno difficulty.
Complete the campaign on Standard difficulty or higher.
Invest 5 Crystals in weapon upgrades.
Invest 25 Crystals in weapon upgrades.
Fully upgrade a weapon's elemental damage.
Add elemental damage to a weapon.
Destroy an Enclave.
Destroy 10 Enclaves.
Kill 350 Demons as Master Sergeant Asher.
Kill 350 Demons as Private Chester.
Kill 350 Demons as Agent Cross.
Kill 150 Demons with Explosives. (Excluding Weapons/Powers)
Kill 350 Demons as Corporal Harris.
Kill 350 Demons as Sergeant Malkov.
Kill 350 Demons as Dr. Miller.
Kill 250 Demons with Powers.
Kill 750 Demons.
Kill 1500 Demons.
Complete a Mission in Co-Op. (Local or Online)
Unlock all Powers.
Fully upgrade all Powers.
Fully upgrade all of a Character's Powers.