Here is the full list of all 36 Birth of a Hunter achievements.
Finish a game on normal difficulty
Finish a game on roguelite difficulty
Finish a game on JB difficulty
Finish a game on JB roguelite difficulty
Defeat Robynn
Defeat RO23
Defeat Lyzz
Defeat Sir Zapbrella
Defeat Sypnyx
Defeat the VFO
Defeat Charon
Defeat Keyzo
Defeat the L33c4
Defeat the Statue Queen
Find 9 items
Retrieve 9 items
Find 18 items
Retrieve 18 items
Find all 27 items
Retrieve all 27 items
Die in a non-roguelite mode
Die in a roguelite mode
Defeat the VFO pilot
Leave the VFO pilot alone
Defeat a tank
Take a shortcut with the phase suit
Jump off an enemy with the spin attack
Walk underneath a one block high gap in the SMOL suit
Absorb electrical energy with the electric armour
Use the blizzard visor in an actual blizzard
Find your way with the map visor
Chain attack five enemies with the zap gun
Hit an enemy through the wall with a drill missile
Hit three enemies with a single bounce missile
Hit an above water enemy with the laser gun, from underwater
Land a blow with the sword