Full list of all 12 Aces of the Galaxy achievements worth 200 gamerscore. It takes around 6-8 hours to unlock all of the achievements on Xbox 360.
Complete Level 2 on any Difficulty
Finish Solo game on Normal
Finish Solo game on Hard
Finish Co-op game on Normal
Finish Co-op game on Hard
Earn 5 Stars on any Level, on any Difficulty
Earn 5 Stars on all 25 Levels on Normal
Earn 5 Stars on all 25 Levels on Hard
Complete Level 5 in an Xbox LIVE Co-op match
Achieve 10,000,000 points
Complete 5 Levels without losing a life
Finish game without losing a life