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