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