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