Here is the full list of all 63 Hollow Knight: Voidheart Edition achievements worth 1,000 gamerscore.
Complete the Pantheon of the Sage
Defeat Radiance and consume the light
Complete the Pantheon of the Artist
Complete the Pantheon of the Master
Receive the Hunter's Mark
Complete the Trial of the Fool
Record all of Hallownest's creatures in the Hunter's Journal
Banish the Grimm Troupe from Hallownest
Defeat Troupe Leader Grimm
Achieve 100% game completion and finish the game
Aid the Herald in moving on
Defeat the Hollow Knight with Hornet by your side
Acquire all Mask Shards
Bring peace to the Grey Mourner
Collect 2400 Essence and hear the Seer's final words
Defeat Grey Prince Zote
Defeat Zote in the Colosseum of Fools
Defeat White Defender
Remember the past and unite the Abyss
Acquire all Charms and receive Salubra's blessing
Collect 1800 Essence and awaken the Dream Nail
Defeat the Soul Tyrant
Defeat the Lost Kin
Allow the Nailsmith to find a new calling
Defeat the Failed Champion
Acquire all Vessel Fragments
Defeat the Traitor Lord
Rescue all of the imprisoned grubs
Defeat the Collector
Defeat Hornet in Kingdom's Edge
Complete the Trial of the Conqueror
Complete the Trial of the Warrior
Spend a final moment with Quirrel
Open all of Hallownest's Stag Stations and discover the Stag Nest
Defeat the Hollow Knight and become the Vessel
Acquire a map of each area
Acquire half of Hallownest's Charms
Destroy Monomon the Teacher
Collect 600 Essence
Destroy Lurien the Watcher
Rescue half of the imprisoned grubs
Defeat the Broken Vessel
Destroy Herrah the Beast
Defeat the Mantis Lords
Defeat the Dung Defender
Acquire 4 Mask Shards
Acquire 3 Vessel Fragments
Defeat the Soul Master
Open half of Hallownest's Stag Stations
Defeat Hornet in Greenpath
Acquire your first Charm
Defeat the False Knight
Leave Zote to die
Slay the Nailsmith with the Pure Nail
Complete the game in under 10 hours
Complete the game in under 5 hours
Achieve 100% game completion and finish the game in under 20 hours
Finish the game in Steel Soul mode
Achieve 100% game completion and finish the game in Steel Soul mode
Defeat the Nightmare King and complete the Ritual
Complete the Pantheon of the Knight
Ascend the Pantheon of Hallownest and take your place at its peak
Achieve 112% game completion and finish the game