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