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