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