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 killing Letho.
Kill the dragon.
Help Roche rescue Anais from the Kaedweni camp.
Leave Síle to die in the unstable portal.
Stop Roche from killing Henselt.
Relive all of Auckes's memories in Dethmold's vision.
Tour the camp with Zyvik.
Roll five-of-a-kind at dice poker.
Kill all the trolls in the game.
Finish all quests involing the destruction of monster nests.
Acquire the Mutant ability.
Collect 10000 orens.
Perform three successful ripostes in a row.
Craft a suit of armor from elements of the kayran's carapace.
Cut off a tentacle using the kayran trap.
Successfully sneak through Loredo's garden and find the component of the kayran trap.
Hit Count Etcheverry using the ballista.
Seduce Ves.
Defeat all opponents in the Kaedweni arena.
Finish the game at any difficulty level.
Finish the game by sparing Letho.
Acquire the Sense of Magic ability.
Achieve character level 35.
Reach the Epilogue of the game.
Spare or save Saskia.
Save Síle from dying in the unstable portal.
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.
Acquire the Combat Acumen ability.
Enhance abilities using mutagens at least five times.
Bow to Death at a Winter Shrine.
Complete Chapter 2.
Kill the draug.
Sneak through the lower camp without raising the alarm.
Kill 500 foes.
Spare all trolls in the game.
Kill more than one opponent using a single exploding bomb.
Kill a foe by deflecting his own arrow at him.
Complete Chapter 1.
Bow before the Sun at a Summer Shrine.
Achieve character level 10.
Kill the kayran.
Brew the ostmurk potion.
Use alchemy to brew five potions or oils.
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.
Finish the Prologue.
Drink one potion.
Intimidate someone.
Kill 10 foes in a row without losing any Vitality.