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