Here is the full list of all 50 Star Ocean: The Last Hope achievements worth 1,000 gamerscore.
Completed the game on the Universe difficulty level.
Viewed Arumat's ending sequence.
Viewed Myuria's ending sequence.
Viewed Meracle's ending sequence.
Collected 100% of all monster data.
Defeated the Ethereal Queen.
Obtained 60% of all battle trophies.
Opened 100% of all treasure chests.
Obtained 50% of all battle trophies.
Defeated Gabriel Celeste.
Obtained 40% of all battle trophies.
Viewed Lymle's ending sequence.
Created 80% of all possible items.
Took over the top spot in solo or team battle rankings.
Broke into the top 10 in solo or team battle rankings.
Broke into the top 30 in solo or team battle rankings.
Obtained 30% of all battle trophies.
Collected 100% of all spaceship data.
Viewed Reimi's ending sequence.
Viewed Sarah's ending sequence.
Viewed Bacchus's ending sequence.
Defeated Satanail in the Palace of Creation on Nox Obscurus.
Defeated Kokabiel and her spawn in the sacred En II Sanctuary.
Created 60% of all possible items.
Completed 60% of all quests.
Created 40% of all possible items.
Created 20% of all possible items.
Collected 50% of all monster data.
Defeated Armaros Manifest in the grimy depths of the Miga Insect Warren.
Obtained 20% of all battle trophies.
Opened 50% of all treasure chests.
Completed 30% of all quests.
Defeated Tamiel and his Sydonaist henchmen in the hallowed halls of the Purgatorium.
Obtained 10% of all battle trophies.
Narrowly escaped from the alternate Earth before its untimely demise...
Defeated Sahariel in the Cardianon control tower's central isolation chamber.
Defeated Barachiel in the engine room of the celestial ship.
Defeated Armaros on the northern coast of Aeos.
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Obtain 70% of all battle trophies.
Obtain 80% of all battle trophies.
Obtain 90% of all battle trophies.
Obtain 100% of all battle trophies.
Collect 100% of all weapon data.
Create 100% of all possible items.
Complete 100% of all quests.