Here is the full list of all 78 The Witcher 3: Wild Hunt - there are Complete Edition achievements worth 2,000 gamerscore.
Finish the game on the "Blood and Broken Bones!" or "Death March!" difficulty levels.
Finish the game on the "Death March!" difficulty level.
Complete the subplot about choosing Skellige's ruler.
Finish the game on any difficulty.
Defeat Eredin.
Kill 20 cows.
Find all grandmaster diagrams for each witcher school.
Acquire all the Abilities in one tree.
Kill 3 opponents with their own arrows.
Kill Golyat with a crossbow bolt to his eye.
Kill a frozen opponent with a crossbow bolt.
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.
Destroy all monster nests in the Velen / Novigrad region, or in Skellige.
Complete all fistfighting quests in Velen, Skellige and Novigrad.
Defeat Olaf, the Skellige champion of unarmed combat.
Complete all witcher contracts.
Kill 10 opponents by knocking them off somewhere high with the Aard Sign.
Defeat all the fallen knights and loot their campsites.
Visit Tir ná Lia and convince Ge'els to betray Eredin.
Perform 10 effective counterattacks in a row without getting hit or parrying.
Find Ciri.
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.
Complete the contract on Morvudd.
Help Yennefer extract information from Skjall's body.
Slide downhill uninterrupted for at least 10 seconds.
Complete the contract on Therazane.
Complete the contract on Sarasti.
Find and free Dandelion.
Ignite the gas produced by a Dragon's Dream bomb using a burning opponent. Do this 10 times.
Resolve the doppler problem in Novigrad.
Find the baron's wife and daughter.
Collect the formulae for 6 different bomb types.
Defeat an opponent in a fistfight without taking any damage.
Complete the contract on the shrieker.
Complete the subplot involving Keira Metz.
Kill 2 monsters you have a contract on without using Signs, potions, mutagens, oils or bombs.
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.).
Find Yennefer of Vengerberg.
Unlock the bonus for equipping all the witcher gear elements from one School.
Be decorated with the Order of Vitis Vinifera.
Serve time in Toussaint.
Help unite the warring vineyards and have a wine named in your honor.
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.
Develop a mutation.
Travel to the Duchy of Toussaint.
Collect all available Ofieri armor and horse gear, and at least one Ofieri sword.
Finish the "Hearts of Stone" expansion.
Kill 5 foes in a fight without taking damage (except for Toxicity) and without using the Quen Sign.
Kill at least 5 opponents in under 10 seconds.
Buy all the items put on the block at the Borsodis' Auction House.
Participate in all the activities at the wedding.
Reach character development level 35.
Destroy 10 monster nests using bombs.
Kill the prince cursed into a toad.
Read 30 books, journals or other documents.
Take part in the assassination of King Radovid.
Kill 50 opponents using the environment (e.g. swamp gas, insects or objects).
Play three hero cards in one round of gwent and win the match.
Find and equip all the elements of one set of witcher gear.
Learn 12 potion formulae.
Be under the influence of seven potions or decoctions at the same time.
Fill all mutagen slots.
Discover 100 fast travel points.
Acquire all gwent cards available in the base version of the game.
Win all the horse races in the game.
Win a round of gwent using only neutral cards.
Defeat Tybalt and win the gwent tournament held at the Passiflora.
Collect all the cards in the Skellige deck.
Win a round of gwent with a total strength of at least 187.
Kill 50 human and nonhuman opponents by striking them in the head with a crossbow bolt.
Make an opponent suffer from bleeding, poisoning and burning simultaneously. Do this 10 times.
Attack, counter, cast a Sign and throw a bomb (in any order) in under 4 seconds.
Complete the contract on the Woodland Spirit.