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