Here is the full list of all 40 Final Fantasy XII The Zodiac Age (Windows) achievements worth 1,000 gamerscore.
Defeated 500 foes.
Cast Magicks 200 times.
Completed a 50-chain in battle.
Escaped from the Nalbina Dungeons.
Successfully stole 50 times.
Used Technicks 100 times.
Used Attack 300 times.
Defeated your first mark.
Faced the Archadian Empire as an initiate in the Order of the Knights of Dalmasca.
Took 50,000 steps.
Acquired 100,000 gil.
Obtained 500,000 Clan Points.
Spent 1,000,000 gil.
Sold 1,000 pieces of loot.
Raised your party's average level above 50.
Earned 48,000 License Points.
Completed the Bestiary.
Learned every Magick.
Learned every Technick.
Obtained a Morbid Urn.
Fully explored every map.
Performed every Concurrence.
Defeated Deathgaze.
Defeated Fafnir.
Defeated the Trickster.
Defeated Carrot.
Defeated Gilgamesh.
Defeated the Behemoth King.
Defeated Yiazmat.
Defeated the Hell Wyrm.
Defeated Ultima.
Defeated Zodiark.
Obtained every Esper.
Rescued the Princess of Dalmasca.
Obtained the Dawn Shard.
Set out from Mt Bur-Omisace.
Faced Doctor Cid.
Restored peace to Ivalice.
Completed the 50th trial.
Completed the 100th trial.