Here is the full list of all 52 The Witcher 2: Assassins of Kings Enhanced Edition achievements.
Finish the game while playing at the Insane difficulty level.
Kill the dragon.
Help Roche rescue Anais from the Kaedweni camp.
Stop Roche from killing Henselt.
Relive all of Auckes's memories in Dethmold's vision.
Seduce Ves.
Defeat all opponents in the Kaedweni arena.
Finish the game by killing Letho.
Achieve character level 35.
Save Síle from dying in the unstable portal.
Help Iorveth find the dagger needed to free Saskia from the spell that holds her.
Bow to Death at a Winter Shrine.
Kill three foes at once by performing a group finisher.
Collect 10000 orens.
Sneak through the lower camp without raising the alarm.
Kill all the trolls in the game.
Enhance abilities using mutagens at least five times.
Acquire the Mutant ability.
Acquire the Combat Acumen ability.
Acquire the Sense of Magic ability.
Cut off a tentacle using the kayran trap.
Bow before the Sun at a Summer Shrine.
Perform three successful ripostes in a row.
Hit Count Etcheverry using the ballista.
Roll five-of-a-kind at dice poker.
Finish the game at any difficulty level.
Finish the game by sparing Letho.
Spare or save Saskia.
Reach the Epilogue of the game.
Leave Síle to die in the unstable portal.
Finish all quests involing the destruction of monster nests.
Complete Chapter 2.
Spare all trolls in the game.
Kill the draug.
Kill 500 foes.
Win an arm wrestling match, a dice poker game and a fist fight.
Craft a suit of armor from elements of the kayran's carapace.
Hire a craftsman to create an item.
Tour the camp with Zyvik.
Complete Chapter 1.
Kill the kayran.
Achieve character level 10.
Brew the ostmurk potion.
Find all additional information about the insane asylum's history.
Kill more than one opponent using a single exploding bomb.
Use alchemy to brew five potions or oils.
Kill a foe by deflecting his own arrow at him.
Intimidate someone.
Successfully sneak through Loredo's garden and find the component of the kayran trap.
Finish the Prologue.
Drink one potion.
Kill 10 foes in a row without losing any Vitality.