Here is the full list of all 15 Muv-Luv achievements.
Saw Sumika ending in EXTRA
Saw Meiya ending in EXTRA
Ready for Unlimited
Took five Drill Milky Punches to the face
Started Muv-Luv!
Saw Chizuru ending in EXTRA
Saw Kei ending in EXTRA
Saw Miki ending in EXTRA
Saw Common End 1 ending in EXTRA
Saw Common End 2 ending in EXTRA
Saw all possible endings of EXTRA
Saw one possible ending of Unlimited
Saw all possible endings of UNLIMITED
Unlocked Jukebox mode
Completed the CG Gallery