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