Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops.

Slayer of Demon “Armor Spider”

Collect 50,000 bolts.

Defeat the Hypersonic Brainwave Scrambler

Retrieve Chief Zahn's Zoni Vessel.

Slayer of Demon “Phalanx”

Finish the game in Normal Mode

Defeat 250 enemies with headshots

Defeat 70 enemies with the M4

Defeat 50 enemies with the 92FS - 9mm

Defeat 70 enemies with the FAL

Defeat 20 enemies with gunfire by aiming while hanging