Take down 6 airplanes.
Summon 50 Darklings
Unlock 50 collectables
Kill 30 enemies using Darkness Guns
Kill 20 enemies using Black Hole
Trap 5 enemies within a Black Hole
Perform a melee kill for the first time
Devour 300 enemies
Continue playing to unlock this secret achievement.
Bring down the Chopper
Unlock 25 collectables
Kill 25 enemies using execution moves
Real guys stick around for their ladies
Unlock a collectable for the first time
Perform an execution move for the first time
Summon 5 Darklings
Be on the winning side in a multiplayer match in any of the multiplayer modes
Unlock 75 collectables
Unlock 100 collectables
Finish a multiplayer match with less than 5 deaths (minimum of 4 players)
Kill 50 enemies using execution moves
Capture 50 flags in a CTF match
Claim 20 Killing Streaks in multiplayer
Be on the winning side in 5 multiplayer matches
Be on the winning side in 20 multiplayer matches
Only for those who are completely in tune with the Darkness
Capture 20 flags in a CTF match
Kill 7 enemies within 15 seconds
Help those in need
Find a peaceful solution. At least momentarily
Kill the workers in the tunnel
Capture a flag in a CTF match
Take enough damage without dying within a multiplayer match
Kill 30 enemies using Demon Arm
Kill 15 enemies using Creeping Dark
Collect all the Darkling outfits
Complete game on hard setting
Complete game on normal setting
Be on the winning side in 250 multiplayer matches
Be on the winning side in 100 multiplayer matches
Be on the winning side in 50 multiplayer matches