Here is the full list of all 52 The Witcher 2: Assassins of Kings Enhanced Edition achievements.
Finish the game by killing Letho.
Kill the dragon.
Leave Síle to die in the unstable portal.
Kill all the trolls in the game.
Collect 10000 orens.
Acquire the Mutant ability.
Kill a foe by deflecting his own arrow at him.
Acquire the Sense of Magic ability.
Enhance abilities using mutagens at least five times.
Kill more than one opponent using a single exploding bomb.
Cut off a tentacle using the kayran trap.
Perform three successful ripostes in a row.
Achieve character level 35.
Help Iorveth find the dagger needed to free Saskia from the spell that holds her.
Brew the ostmurk potion.
Drink one potion.
Hit Count Etcheverry using the ballista.
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.
Finish all quests involing the destruction of monster nests.
Help Roche rescue Anais from the Kaedweni camp.
Complete Chapter 2.
Stop Roche from killing Henselt.
Spare all trolls in the game.
Kill three foes at once by performing a group finisher.
Kill the draug.
Kill 500 foes.
Relive all of Auckes's memories in Dethmold's vision.
Acquire the Combat Acumen ability.
Seduce Ves.
Defeat all opponents in the Kaedweni arena.
Craft a suit of armor from elements of the kayran's carapace.
Roll five-of-a-kind at dice poker.
Hire a craftsman to create an item.
Tour the camp with Zyvik.
Complete Chapter 1.
Kill the kayran.
Achieve character level 10.
Successfully sneak through Loredo's garden and find the component of the kayran trap.
Find all additional information about the insane asylum's history.
Use alchemy to brew five potions or oils.
Intimidate someone.
Win an arm wrestling match, a dice poker game and a fist fight.
Finish the Prologue.
Kill 10 foes in a row without losing any Vitality.
Finish the game while playing at the Insane difficulty level.
Sneak through the lower camp without raising the alarm.
Bow before the Sun at a Summer Shrine.
Bow to Death at a Winter Shrine.