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