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