No missable achievements (plus 41 unknown)
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Get your first death
Slash a missile
Destroy a flier on water electrocuted
Slash a thrown spear
Clear the Main Stage
Draw in and survive the wave of Ziggurat patrollers in the Ziggurat Prison
Drop all existing Flier Drones on the water in the Main Stage
Destroy the turret in the Prison Halls before the Alpha gets to it
Kill the Necromancer in the Ziggurat
Clear the Ziggurat mode killing all bosses
Spare the Necromancer in the Ziggurat
Spare the Dryad in the Ziggurat
Spare the Gorgon in the Ziggurat
Find the breakable wall in the Main Stage
Kill the Gorgon in the Ziggurat
Juggle the White Drone until it explodes
Kill the Dryad in the Ziggurat
Provoke no fights when in the Ziggurat Prison
Spare the Insect in the Ziggurat
Get the two guards to enter your cell in the Ziggurat Prison
Get the best affinity with Euryale
Get an ending where you escape from the Ziggurat
Make it to Ishtar's throne room
Kill the Insect in the Ziggurat
Assault Shiah when she asks you to kneel
Free the survivors from the Ziggurat in your ending
Beat a Ziggurat boss without losing a life
Destroy the Death Dampener machine
Don't let the Low Levels jam the elevator gears in the Ziggurat
Kill the Necromancer's support corpse
Clear the Ziggurat mode killing no bosses
Be granted freedom alone from the Ziggurat in your ending
Acquire Gorgon's Blood
Survive the Dungeon's first floor in the Trap Room when you're dropped
Acquire the Biotech Boost
Tell Euryale to go away
Acquire Alruna's Seed
Acquire the Necromancer's Pendant
Destroy the merged Kazazak and Alpha
Collect all BGM Files
Collect all Data Files