Complete the game on Hardened or Veteran difficulty.
Kill 20 enemies with explosives in a single level.
Kill 5 enemies with one shot while in the AC-130 gunship.
Kill 4 enemies in a row with headshots in the single player campaign.
Kill at least 3 rappelling enemies in a single rope.
Kill all 4 tanks on the overpass with the Javelin missile in 'The Bog'.
Complete any level without reloading your weapon (excluding 'The Coup' and 'Aftermath').
Get a kill with each type of handheld gun, explosive and launcher in the single player campaign.
Complete 'Ultimatum', 'All In', and 'No Fighting in the War Room' on Veteran difficulty.