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