There are 91 achievements tracked for UnNetHack in the Junethack tournament.
ascended
entered Astral Plane
entered Elemental Planes
obtained the Amulet of Yendor
performed the Invocation Ritual
obtained the Book of the Dead
obtained the Bell of Opening
obtained the Candelabrum of Invocation
entered Gehennom
defeated Medusa
obtained the luckstone from the Mines
obtained the Sokoban Prize
escaped in celestial disgrace
Assault on Fort Knox (defeated Croesus)
Hoarder (ascended carrying all the invocation items)
ascended without writing Elbereth
Too good for Vladbanes (ascended without defeating Vlad)
Too good for quests (ascended without defeating the quest nemesis)
Too good for... wait, what? How? (ascended without defeating Rodney)
consulted the Oracle
entered a shop
entered a temple
entered Sokoban
entered the Gnomish Mines
entered Mine Town
entered the Big Room
entered the Town
entered Fort Ludios
entered Quest Home
entered Moria
entered the Dragon Caves
entered Sheol
entered Vlad's tower
entered the Blackmarket
Mini-Croesus (finish a game with at least 25,000 gold pieces)
Croesus' buddy (finish a game with at least 100,000 gold pieces)
Better than Croesus (finish a game with at least 200,000 gold pieces)
Too good for a brain (ascended without defeating Cthulhu)
Heaven or Hell (ascend in 1 HP mode)
ascended in marathon mode
You Are War! (defeated Death, Famine, and Pestilence)
Demonbuster (defeated all demon lords and princes)
Viel Feind', viel Ehr' (defeated all Quest nemeses)
You already know the way (defeated all Quest leaders)
defeated Death
defeated Famine
defeated Pestilence
defeated Cthulhu
defeated the Wizard of Yendor
No membership card (defeated One-Eyed Sam)
Make War Not Love (defeated Aphrodite)
defeated Vlad the Impaler
No Further Knowledge Required (defeated the Oracle)
defeated the Executioner
defeated Durin's Bane
defeated the Watcher in the Water
defeated Asmodeus
defeated Baalzebub
defeated Demogorgon
defeated Dispater
defeated Geryon
defeated Juiblex
defeated Orcus
defeated Yeenoghu
defeated Lord Carnarvon, the Archeologist quest leader
defeated Pelias, the Barbarian quest leader
defeated Shaman Karnov, the Caveman quest leader
defeated Robert the Lifer, the Convict quest leader
defeated Hippocrates, the Healer quest leader
defeated King Arthur, the Knight quest leader
defeated Grand Master, the Monk quest leader
defeated the Arch Priest, the Priest quest leader
defeated Orion, the Ranger quest leader
defeated the Master of Thieves, the Rogue quest leader and Tourist quest nemesis
defeated Lord Sato, the Samurai quest leader
defeated Twoflower, the Tourist quest leader
defeated Norn, the Valkyrie quest leader
defeated Neferet the Green, the Wizard quest leader
defeated Schliemann, the Archeologist quest nemesis
defeated Thoth Amon, the Barbarian quest nemesis
defeated Tiamat, the Caveman quest nemesis
defeated Warden Arianna, the Convict quest nemesis
defeated Cyclops, the Healer quest nemesis
defeated Ixoth, the Knight quest nemesis
defeated Master Kaen, the Monk quest nemesis
defeated Nalzok, the Priest quest nemesis
defeated Scorpius, the Ranger quest nemesis
defeated the Master Assassin, the Rogue quest nemesis
defeated Ashikaga Takauji, the Samurai quest nemesis
defeated Lord Surtur, the Valkyrie quest nemesis
defeated the Dark One, the Wizard quest nemesis