ACHIEVEMENT - HOW TO UNLOCK Battle Hardened - Complete the game. Doom Bringer - Get full destruction on a level. Eager Beaver - Complete a secondary objective. Fight Fire with Fire - Kill a flame thrower guy with a flame thrower. Good ol' Emma Gee - Complete a level using only the machine gun. Iron Warrior - Complete every level in the game on Hard. Ironheart - Complete a level without dying. Keep your powder dry - Complete a level without firing a single shot. Pickpocket - Collect all of the intel in a single level. Rookie Run - Complete any level of the game. Secret Weapon - Collect all of the intel in the entire game. Teacher's Pet - Complete all secondary objectives.