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