Achievements:ACHIEVEMENT – HOW TO UNLOCKEnlistment (5 points) – Enter the Main Menu. Crucible (5 points) – Clear the game on Normal in single player mode. Onslaught (5 points) – Clear the game on Hard in single player mode. Wings of Friendship (5 points) – Play a CO-OP Mode game. Sandwich Man (10 points) – Kill 10 Sandwich enemies. Snake Killer (10 points) – Kill 10 Snake enemies. Mosquito Killer (10 points) – Kill 10 Mosquito enemies. Valiant Warrior (20 points) – Kill 100 targets in CO-OP Mode.Like taking candy from a baby (20 points) – Occupied all control points in Control Point mode. Gold Hammer (30 points) – Cleared the game on Normal difficulty or harder without losing a life. May Day King (30 points) – Got shot down 256 times. Ruler of the Universe (50 points) – Earned every rank.