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