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