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