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