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