Here is the full list of all 36 Mad Devils achievements.
Unlock all other achievements.
Complete the campaign on Easy difficulty or higher.
Complete the campaign on Standard difficulty or higher.
Complete the campaign on Inferno difficulty.
Complete the Training Mission and enter the Hub.
Defeat a Nachtrapt. (Scotland)
Defeat Famine. (India)
Rescue Corporal Harris. (Frankfurt)
Defeat Pestilence. (Ukraine)
Rescue Dr. Miller. (South Wales)
Rescue Sergeant Malkov. (Ireland)
Defeat War. (Africa)
Rescue Private Chester. (Norway)
Defeat Major Struass.
Complete a Mission in Co-Op. (Local or Online)
Kill 750 Demons.
Kill 1500 Demons.
Kill 350 Demons as Master Sergeant Asher.
Kill 350 Demons as Agent Cross.
Kill 350 Demons as Corporal Harris.
Kill 350 Demons as Dr. Miller.
Kill 350 Demons as Private Chester.
Kill 350 Demons as Sergeant Malkov.
Kill 150 Demons with Explosives. (Excluding Weapons/Powers)
Kill 250 Demons with Powers.
Unlock all Powers.
Fully upgrade all of a Character's Powers.
Fully upgrade all Powers.
Invest 5 Crystals in weapon upgrades.
Invest 25 Crystals in weapon upgrades.
Add elemental damage to a weapon.
Fully upgrade a weapon's elemental damage.
Destroy an Enclave.
Destroy 10 Enclaves.
Unlock a Collectable.
Unlock All Collectables.