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