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