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