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