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