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