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