Here is the full list of all 27 UNDER NIGHT IN-BIRTH II Sys:Celes achievements.
Obtained all trophies.
Finished Arcade Mode for the first time.
Finished Arcade Mode with three characters.
Finished Arcade Mode with six characters.
Finished Score Attack Mode for the first time.
Earned over 1,000,000,000 total points in Score Attack Mode.
Finished Time Attack Mode for the first time.
Finished Time Attack Mode in under ten minutes with three characters.
Fought 10 or more battles in Survival Mode.
Fought 20 or more battles in Survival Mode.
Fought 40 or more battles in Survival Mode.
Completed 10 beginner combo challenges in Mission Mode.
Completed eight intermediate combo challenges in Mission Mode.
Completed six advanced combo challenges in Mission Mode.
Completed all novice missions in Tutorial Mode.
Completed all beginner missions in Tutorial Mode.
Completed all intermediate missions in Tutorial Mode.
Played back Replay data.
Won against a CPU opponent for the first time in Versus Mode.
Purchased an SD character illustration for the Gallery.
Purchased a website illustration for the Gallery.
Purchased a design pixel artwork for the Gallery.
Purchased a voice for the Gallery.
Purchased BGM for the Gallery.
Fought in an online ranked match for the first time.
Fought in an online player match for the first time.
Won an online match for the first time.