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