Full list of all 10 Ninety-Nine Nights achievements worth 1,000 gamerscore. It takes around 40-50 hours to unlock all of the achievements on Xbox 360.
Complete all of Inphyy’s missions.
Complete all of Aspharr’s missions.
Complete all of Myifee’s missions.
Complete all of Tyurru’s missions.
Complete all of Klarrann’s missions.
Complete the special mission.
Complete all of Dwingvatt’s missions.
Complete all of the mystery character’s missions.
Earn A-ranking in every mission of every character.
Build every character up to Level 9.