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