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