Full list of all 17 Galactic Wars EX achievements worth 1,000 gamerscore. It takes around 4-5 hours to unlock all of the achievements on Xbox One.
You lost all your lives before the third wave
You continued until you exhausted all your credits
You got your ship to its maximum missile capacity and collected a missile orb
You got your ship to its maximum fire power level and transformed a shot orb into an energy one
You contimued the game after losing all your lives
You achieved your first perfect wave
Achieve four perfect waves in a row X5 Score Multiplier
Get into the original high score table
Complete the first mission with the Vulxen 77
Complete the first mission with the Lexus 69
Complete the first mission with the Gyxuss 82
Complete the first mission without losing a single life
Complete a mission with a Rank B or higher
Complete a mission with an accuracy of 50% or better
Complete the second mission
Destroy the final boss in its hive
Complete a mission without collecting a shield orb