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