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