Here is the full list of all 52 The Witcher 2: Assassins of Kings Enhanced Edition achievements.
Finish the game by killing Letho.
Kill the dragon.
Save Síle from dying in the unstable portal.
Help Roche rescue Anais from the Kaedweni camp.
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.
Acquire the Mutant ability.
Tour the camp with Zyvik.
Kill a foe by deflecting his own arrow at him.
Kill more than one opponent using a single exploding bomb.
Bow before the Sun at a Summer Shrine.
Hit Count Etcheverry using the ballista.
Roll five-of-a-kind at dice poker.
Perform three successful ripostes in a row.
Finish the game at any difficulty level.
Finish the game by sparing Letho.
Reach the Epilogue of the game.
Spare or save Saskia.
Leave Síle to die in the unstable portal.
Achieve character level 35.
Help Iorveth find the dagger needed to free Saskia from the spell that holds her.
Collect 10000 orens.
Acquire the Sense of Magic ability.
Finish all quests involing the destruction of monster nests.
Enhance abilities using mutagens at least five times.
Bow to Death at a Winter Shrine.
Use alchemy to brew five potions or oils.
Complete Chapter 2.
Kill three foes at once by performing a group finisher.
Kill the draug.
Sneak through the lower camp without raising the alarm.
Kill 500 foes.
Spare all trolls in the game.
Acquire the Combat Acumen ability.
Complete Chapter 1.
Craft a suit of armor from elements of the kayran's carapace.
Find all additional information about the insane asylum's history.
Achieve character level 10.
Kill the kayran.
Cut off a tentacle using the kayran trap.
Drink one potion.
Hire a craftsman to create an item.
Brew the ostmurk potion.
Successfully sneak through Loredo's garden and find the component of the kayran trap.
Intimidate someone.
Win an arm wrestling match, a dice poker game and a fist fight.
Finish the Prologue.
Kill 10 foes in a row without losing any Vitality.
Finish the game while playing at the Insane difficulty level.