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