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