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