Full list of all 10 Galaga Legions DX achievements worth 200 gamerscore. It takes around 12-15 hours to unlock all of the achievements on Windows Phone.
Cleared Area 1!
Cleared Area 2!
Cleared Area 3!
Scored 3,000,000 points in Area 1!
Scored 2,500,000 points in Area 2!
Scored 3,300,000 points in Area 3!
Scored 5,500,000 points in Championship!
Area cleared without losing a single fighter!
Cleared all areas on Expert difficulty!