Here is the full list of all 50 The Witcher 2: Assassins of Kings (EU) achievements worth 1,000 gamerscore.
Seduce Ves.
Defeat all opponents in the Kaedweni arena.
Craft a suit of armor from elements of the kayran's carapace.
Tour the camp with Zyvik.
Complete Chapter 1.
Achieve character level 10.
Kill the kayran.
Cut off a tentacle using the kayran trap.
Find all additional information about the insane asylum's history.
Successfully sneak through Loredo's garden and find the component of the kayran trap.
Win an arm wrestling match, a dice poker game and a fist fight.
Hire a craftsman to create an item.
Hit Count Etcheverry using the ballista.
Complete the Prologue.
Intimidate someone.
Use alchemy to brew five potions or oils.
Complete Chapter 2.
Complete Chapter 3.
Acquire the Mutant ability.
Finish the game by killing Letho.
Kill 500 foes.
Collect 10000 orens.
Perform three successful ripostes in a row.
Finish all quests involing the destruction of monster nests.
Kill the dragon.
Kill the draug.
Kill more than one opponent using a single exploding bomb.
Finish the game while playing at the Dark difficulty level.
Help Roche rescue Anais from the Kaedweni camp.
Spare or save Saskia.
Achieve character level 35.
Acquire the Sense of Magic ability.
Enhance abilities using mutagens at least five times.
Relive all of Auckes's memories in Dethmold's vision.
Finish the game by sparing Letho.
Survive your 30th fight in the Arena
Kill 10 foes in a row without losing any Vitality.
Roll five-of-a-kind at dice poker.
Survive your 5th fight in the Arena
Kill a foe by deflecting his own arrow at him.
Save Síle from dying in the unstable portal.
Sneak through the lower camp without raising the alarm.
Help Iorveth find the dagger needed to free Saskia from the spell that holds her.
Stop Roche from killing Henselt.
Acquire the Combat Acumen ability.
Finish the game at any difficulty level.
Kill three foes at once by performing a group finisher.
Spare all trolls in the game.
Kill all the trolls in the game.
Leave Síle to die in the unstable portal.