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