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