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