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