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