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