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