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