Enlistment
Reward: 5 Points
Objective: Enter the Main Menu

Crucible
Reward: 5 Points
Objective: Clear the game on Normal in single player mode

Onslaught
Reward: 5 Points
Objective: Clear the game on Hard in single player mode

Wings of Friendship
Reward: 5 Points
Objective: Play a CO-OP Mode game

Sandwich Man
Reward: 10 Points
Objective: Kill 10 Sandwich enemies

Snake Killer
Reward: 10 Points
Objective: Kill 10 Snake enemies

Mosquito Killer
Reward: 10 Points
Objective: Kill 10 Mosquito enemies

Valiant Warrior
Reward: 20 Points
Objective: Kill 100 targets in CO-OP Mode

Secret Achievements

Like taking candy from a baby
Reward: 20 Points
Objective: Occupied all control points in CONTROL POINT MODE

Gold Hammer
Reward: 30 Points
Objective: Cleared the game on Normal difficulty or harder without losing a life

May Day King
Reward: 30 Points
Objective: Got shot down 256 times

Ruler of the Universe
Reward: 50 Points
Objective: Earned every rank