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