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