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