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