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