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