Full list of all 78 The Witcher 3: Wild Hunt achievements. It takes around 100-120 hours to unlock all of the achievements in the base game on Windows.
The base game contains 52 achievements, and there are 3 DLC packs containing 26 achievements.
Destroy all monster nests in the Velen / Novigrad region, or in Skellige.
Attack, counter, cast a Sign and throw a bomb (in any order) in under 4 seconds.
Use the Axii Sign to force one opponent to kill another. Do this 20 times.
Perform 10 effective counterattacks in a row without getting hit or parrying.
Acquire all gwent cards available in the base version of the game.
Have all possible Place of Power bonuses active at the same time.
Finish the game on any difficulty.
Defeat Eredin.
Take part in the assassination of King Radovid.
Make an opponent suffer from bleeding, poisoning and burning simultaneously. Do this 10 times.
Visit Tir ná Lia and convince Ge'els to betray Eredin.
Reach character development level 35.
Ignite the gas produced by a Dragon's Dream bomb using a burning opponent. Do this 10 times.
Defeat Tybalt and win the gwent tournament held at the Passiflora.
Complete all witcher contracts.
Find and equip all the elements of one set of witcher gear.
Fill all mutagen slots.
Find Ciri.
Complete all fistfighting quests in Velen, Skellige and Novigrad.
Defeat Olaf, the Skellige champion of unarmed combat.
Bring all possible allies to Kaer Morhen for the battle against the Hunt.
Complete the contract on Morvudd.
Acquire all the Abilities in one tree.
Complete the subplot about choosing Skellige's ruler.
Complete the contract on the Woodland Spirit.
Help Yennefer extract information from Skjall's body.
Win all the horse races in the game.
Discover 100 fast travel points.
Find and free Dandelion.
Complete the contract on Therazane.
Complete the contract on Sarasti.
Play three hero cards in one round of gwent and win the match.
Win a round of gwent using only neutral cards.
Kill 50 opponents using the environment (e.g. swamp gas, insects or objects).
Collect the formulae for 6 different bomb types.
Resolve the doppler problem in Novigrad.
Find the baron's wife and daughter.
Kill 2 monsters you have a contract on without using Signs, potions, mutagens, oils or bombs.
Complete the subplot involving Keira Metz.
Destroy 10 monster nests using bombs.
Defeat an opponent in a fistfight without taking any damage.
Kill 5 foes in a fight without taking damage (except for Toxicity) and without using the Quen Sign.
Complete the contract on the shrieker.
Read 30 books, journals or other documents.
Kill at least 5 opponents in under 10 seconds.
Kill 3 opponents in one fight using 3 different methods (swords, bombs, crossbow, Signs, etc.).
Find Yennefer of Vengerberg.
Learn 12 potion formulae.
Finish the game on the "Blood and Broken Bones!" or "Death March!" difficulty levels.
Finish the game on the "Death March!" difficulty level.
Kill 10 opponents by knocking them off somewhere high with the Aard Sign.
Kill 50 human and nonhuman opponents by striking them in the head with a crossbow bolt.
Kill 20 cows.
Slide downhill uninterrupted for at least 10 seconds.
Be under the influence of seven potions or decoctions at the same time.
Defeat all the fallen knights and loot their campsites.
Win a round of gwent with a total strength of at least 187.
Finish the "Hearts of Stone" expansion.
Provoke all Iris von Everec's Nightmares into fighting you at the same time and defeat them.
Recreate all of Iris' nightmares in the Painted World.
Buy all the items put on the block at the Borsodis' Auction House.
Participate in all the activities at the wedding.
Kill the prince cursed into a toad.
Collect all available Ofieri armor and horse gear, and at least one Ofieri sword.
Kill 3 opponents with their own arrows.
Find all grandmaster diagrams for each witcher school.
Be decorated with the Order of Vitis Vinifera.
Use all available options for developing Corvo Bianco.
Obtain a flawless victory in all the competitions during the knights' tourney.
Unlock the bonus for equipping all the witcher gear elements from one School.
Collect all the cards in the Skellige deck.
Develop a mutation.
Be given Aerondight by the Lady of the Lake.
Travel to the Duchy of Toussaint.
Serve time in Toussaint.