Here is the full list of all 41 Divinity II: Ego Draconis (EU) achievements worth 1,000 gamerscore.
HowTo String for achievement 01
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HowTo String for achievement 07
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HowTo String for achievement 15
Finish the game.
Kill Casper.
Kill the Killer Bunny.
Scare away the fortune teller.
Destroy all of Damian's Flying Fortresses.
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HowTo String for achievement 30
Bring to justice all of Rivellon's most wanted criminals.
Find Adah and Mahalath's secret cave.
Cure blindness.
Upgrade all your Battle Tower platforms to their maximal potential.
Send one of your runners on a mission.
Read someone's mind.
Summon your creature.
Level up once.
Reach an epic level.
Charm an item.
Enchant an item.
Create a Potion.
Make use of your skills trainer.
Trade with someone.
Morph into a Dragon.
Make use of an illusionist's services.
Use the Dragon Stone.