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