The 60 decks

The ship is sixty decks deep. Its biomes repeat on the way down — the second pass (“II”) and the third (“III”) are darker, rust- and violet-tinted, and home to deeper natives. A boss guards every third deck; the escape craft waits in the Reactor on deck 60.

Deck	Name	Boss	Loot grade	Enemy kinds	Notes
1	Habitation		—	3	Crew quarters and mess. The bunks are made and the coffee is decades cold. Everyone left in a hurry — or never left at all.
2	Hydroponics		—	6	Food gardens gone feral. The vines learned to reach back, so the crew sealed the doors — from the outside.
3	Bio-Lab	brood matron	—	8	Where the ship studied what it found adrift. The samples studied back. Containment is a suggestion here now.
4	Cargo Hold		—	10	Manifests stacked for a port that never received them. Loader frames still shuffle crates in the dark.
5	Cryo Bay		—	12	Long-sleep berths for the voyage home. Most pods read empty. A few read occupied. None read alive.
6	Flooded Deck	dock custodian	—	14	A coolant breach drowned this level. Things adapted to the wet, and the cold, and the long wait.
7	Vacuum Breach		—	19	Hull opened to the void here. The seals mostly hold. Move fast and don't trust the pressure lights.
8	Medbay		—	16	Surgery and recovery. The autodocs kept operating long after there was anything left to save.
9	Server Vault	security overseer	—	19	The ship's memory, humming behind blast doors. The Overseer's thoughts still live in these racks.
10	Armory		—	16	Weapons lockers and assault frames. The crew armed up before the end. It was nowhere near enough.
11	Dark Sub-Deck		—	18	Off the schematics — unlit, unlogged, unpressurised in places. The ship forgot this level on purpose.
12	Maintenance Bay	foundry warden	—	20	Where the repair drones docked. Now the machinery mends itself, endlessly, growing into the walls.
13	Quarantine		—	21	Sealed with the worst of it inside. The signage still glows: DO NOT OPEN. Someone did anyway.
14	Engine Core		—	20	The drive that woke on its own and chose an unknown course. The heat in here behaves like something alive.
15	Bridge Wreckage	hive mother	—	17	The command deck, blown open to a starfield nobody's watching. Cold emergency lighting over consoles that stopped mattering.
16	Xenobio Containment		—	17	Bio-Lab's worse sibling. Whatever got loose here didn't stay in one sample jar for long.
17	Drive Coil Access		—	17	Engineering deeper than the Engine Core — bare, arcing coils, not sealed reactor plumbing. Nothing insulates you down here.
18	The Ossuary	corrosion mass	—	16	Crew remains fused into the bulkheads, decades of them. This is revenant country, and it's crowded.
19	Black Vault		—	16	The ship's classified security archive. Whatever it was protecting, it's still protecting — bigger and angrier than before.
20	Abyssal Hold		—	15	Flooded cargo under crushing pressure, worse than the deck above sea level. Things down here don't need to breathe.
21	Containment Threshold	sovereign overseer	—	15	The corruption is visibly seeping upward here — the deck that convinced the crew to seal everything below it. They were right to.
22	Corrupted Depths		—	15	Past the Threshold, the corruption stopped seeping and started owning the place outright.
23	The Choir		—	13	Something learned to sing in the ship's own resonant frequency. The comms system still carries it, deck-wide.
24	Marrow Vault	marrow warden	—	13	Bone and cable, fused into the walls by whatever the corruption became down here. It remembers being crew.
25	Slag Furnace		—	12	Molten runoff from something far below the Engine Core. It's hotter than anything above it, and it's still rising.
26	The Last Mile		—	12	The final stretch. Everything down here exists to make sure you don't reach the Reactor.
27	Habitation II	hold maw	Mk II	38	Crew quarters and mess. The bunks are made and the coffee is decades cold. Everyone left in a hurry — or never left at all.
28	Hydroponics II		Mk II	38	Food gardens gone feral. The vines learned to reach back, so the crew sealed the doors — from the outside.
29	Bio-Lab II		Mk II	37	Where the ship studied what it found adrift. The samples studied back. Containment is a suggestion here now.
30	Cargo Hold II	pack alpha	Mk II	37	Manifests stacked for a port that never received them. Loader frames still shuffle crates in the dark.
31	Cryo Bay II		Mk II	35	Long-sleep berths for the voyage home. Most pods read empty. A few read occupied. None read alive.
32	Flooded Deck II		Mk II	34	A coolant breach drowned this level. Things adapted to the wet, and the cold, and the long wait.
33	Vacuum Breach II	citadel battery	Mk II	35	Hull opened to the void here. The seals mostly hold. Move fast and don't trust the pressure lights.
34	Medbay II		Mk III	35	Surgery and recovery. The autodocs kept operating long after there was anything left to save.
35	Server Vault II		Mk III	33	The ship's memory, humming behind blast doors. The Overseer's thoughts still live in these racks.
36	Armory II	the unquiet choir	Mk III	32	Weapons lockers and assault frames. The crew armed up before the end. It was nowhere near enough.
37	Dark Sub-Deck II		Mk III	32	Off the schematics — unlit, unlogged, unpressurised in places. The ship forgot this level on purpose.
38	Maintenance Bay II		Mk III	32	Where the repair drones docked. Now the machinery mends itself, endlessly, growing into the walls.
39	Quarantine II	spore mother	Mk III	32	Sealed with the worst of it inside. The signage still glows: DO NOT OPEN. Someone did anyway.
40	Engine Core II		Mk III	32	The drive that woke on its own and chose an unknown course. The heat in here behaves like something alive.
41	Bridge Wreckage II		Mk IV	33	The command deck, blown open to a starfield nobody's watching. Cold emergency lighting over consoles that stopped mattering.
42	Xenobio Containment II	coil leviathan	Mk IV	34	Bio-Lab's worse sibling. Whatever got loose here didn't stay in one sample jar for long.
43	Drive Coil Access II		Mk IV	34	Engineering deeper than the Engine Core — bare, arcing coils, not sealed reactor plumbing. Nothing insulates you down here.
44	The Ossuary II		Mk IV	32	Crew remains fused into the bulkheads, decades of them. This is revenant country, and it's crowded.
45	Black Vault II	archseraph	Mk IV	33	The ship's classified security archive. Whatever it was protecting, it's still protecting — bigger and angrier than before.
46	Abyssal Hold II		Mk IV	33	Flooded cargo under crushing pressure, worse than the deck above sea level. Things down here don't need to breathe.
47	Containment Threshold II		Mk IV	32	The corruption is visibly seeping upward here — the deck that convinced the crew to seal everything below it. They were right to.
48	Corrupted Depths II	strider colossus	Mk V	34	Past the Threshold, the corruption stopped seeping and started owning the place outright.
49	The Choir II		Mk V	35	Something learned to sing in the ship's own resonant frequency. The comms system still carries it, deck-wide.
50	Marrow Vault II		Mk V	34	Bone and cable, fused into the walls by whatever the corruption became down here. It remembers being crew.
51	Slag Furnace II	hunter prime	Mk V	33	Molten runoff from something far below the Engine Core. It's hotter than anything above it, and it's still rising.
52	The Last Mile II		Mk V	32	The final stretch. Everything down here exists to make sure you don't reach the Reactor.
53	Habitation III		Mk V	30	Crew quarters and mess. The bunks are made and the coffee is decades cold. Everyone left in a hurry — or never left at all.
54	Hydroponics III	slag heart	Mk V	32	Food gardens gone feral. The vines learned to reach back, so the crew sealed the doors — from the outside.
55	Bio-Lab III		Mk VI	34	Where the ship studied what it found adrift. The samples studied back. Containment is a suggestion here now.
56	Cargo Hold III		Mk VI	34	Manifests stacked for a port that never received them. Loader frames still shuffle crates in the dark.
57	Cryo Bay III	the last captain	Mk VI	36	Long-sleep berths for the voyage home. Most pods read empty. A few read occupied. None read alive.
58	Flooded Deck III		Mk VI	40	A coolant breach drowned this level. Things adapted to the wet, and the cold, and the long wait.
59	Vacuum Breach III		Mk VI	35	Hull opened to the void here. The seals mostly hold. Move fast and don't trust the pressure lights.
60	Reactor	reactor sentinel	Mk VI	31	The ship's heart, and the escape craft's berth. What the crew fed the reactor still moves down here.