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