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