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