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