Full list of all 13 Phantasy Star Universe achievements worth 1,250 gamerscore. It takes around 25-30 hours to unlock all of the achievements in the base game.
The base game contains 8 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 5 achievements worth 250 Gamerscore.
Defeated Onmagoug.
Defeated De Ragan.
Defeat the Chapter 7 boss.
Defeat the Chapter 8 boss.
Defeat the Chapter 9 boss.
Defeat the Chapter 11 boss.
Defeat the Chapter 12 boss.
Defeat the last boss.
Mother Brain defeated.
Alterazgohg defeated.
Defeat boss in cave area. (Exclusive to AOTI)
Defeat boss in dark area. (Exclusive to AOTI)