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