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