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