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