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