Here is the full list of all 78 The Witcher 3: Wild Hunt - there are Complete Edition achievements worth 2,000 gamerscore.
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.
Kill 10 opponents by knocking them off somewhere high with the Aard Sign.
Collect all the cards in the Skellige deck.
Serve time in Toussaint.
Be decorated with the Order of Vitis Vinifera.
Kill a frozen opponent with a crossbow bolt.
Help unite the warring vineyards and have a wine named in your honor.
Kill 3 opponents with their own arrows.
Obtain a flawless victory in all the competitions during the knights' tourney.
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.
Use all available options for developing Corvo Bianco.
Develop a mutation.
Kill Golyat with a crossbow bolt to his eye.
Travel to the Duchy of Toussaint.
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.
Ignite the gas produced by a Dragon's Dream bomb using a burning opponent. Do this 10 times.
Participate in all the activities at the wedding.
Buy all the items put on the block at the Borsodis' Auction House.
Collect all available Ofieri armor and horse gear, and at least one Ofieri sword.
Kill 20 cows.
Defeat all the fallen knights and loot their campsites.
Use the Axii Sign to force one opponent to kill another. Do this 20 times.
Kill the prince cursed into a toad.
Reach character development level 35.
Be under the influence of seven potions or decoctions at the same time.
Acquire all the Abilities in one tree.
Win a round of gwent with a total strength of at least 187.
Acquire all gwent cards available in the base version of the game.
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.
Defeat Eredin.
Complete all witcher contracts.
Complete the contract on Therazane.
Take part in the assassination of King Radovid.
Visit Tir ná Lia and convince Ge'els to betray Eredin.
Find and equip all the elements of one set of witcher gear.
Fill all mutagen slots.
Find Ciri.
Bring all possible allies to Kaer Morhen for the battle against the Hunt.
Destroy all monster nests in the Velen / Novigrad region, or in Skellige.
Complete all fistfighting quests in Velen, Skellige and Novigrad.
Discover 100 fast travel points.
Defeat Olaf, the Skellige champion of unarmed combat.
Win all the horse races in the game.
Complete the contract on Morvudd.
Help Yennefer extract information from Skjall's body.
Complete the contract on the Woodland Spirit.
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.
Destroy 10 monster nests using bombs.
Complete the contract on Sarasti.
Complete the subplot about choosing Skellige's ruler.
Slide downhill uninterrupted for at least 10 seconds.
Defeat Tybalt and win the gwent tournament held at the Passiflora.
Find and free Dandelion.
Play three hero cards in one round of gwent and win the match.
Resolve the doppler problem in Novigrad.
Collect the formulae for 6 different bomb types.
Kill at least 5 opponents in under 10 seconds.
Kill 50 opponents using the environment (e.g. swamp gas, insects or objects).
Kill 2 monsters you have a contract on without using Signs, potions, mutagens, oils or bombs.
Complete the contract on the shrieker.
Find the baron's wife and daughter.
Complete the subplot involving Keira Metz.
Read 30 books, journals or other documents.
Learn 12 potion formulae.
Have all possible Place of Power bonuses active at the same time.
Perform 10 effective counterattacks in a row without getting hit or parrying.
Find Yennefer of Vengerberg.
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.