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