End of Abyss Logbook: 100% Completion Guide (All 107 Entries)

The Logbook is End of Abyss’s completion ledger — 107 entries in four sections scanned, read, or picked up across the facility. Five trophies hang off it, and nothing is permanently missable: bosses log themselves when killed, and even the NPCs have post-game catch-up spots.

How scanning works

Activate the scanner, target the entry, and hold until the bar fills — that’s one entry. Four rules that shape the hunt:

• Creatures scan from live specimens — most spawn in many places, so the locations below are just guaranteed sightings.
• Notes are physical documents lying in the world; Data Shards have their own hunt (all 8 shard locations).
• Codes are only visible while scanning — invisible to the naked eye (cheat codes guide).
• Trophies: Zoologist (all creatures), Archivist (all notes), Cryptographer (all codes), Defragmented (all shards), and Completionist (scan everything). Bosses and NPCs count toward Zoologist.

The 42 creatures

Twenty-five monsters, four security machines, and four NPCs — the nine boss entries log themselves on defeat, for 42 total. The notable and easy-to-miss entries:

Creature	Where	Note
Infected Worker	Habitation F1	First catalog entry
Husk	Factory East F2	—
Merged Husks / Husk Brute / Latcher / Parasitic Flea	Habitation F1	Four entries in one sweep
Leechworm / Leechgut / Lurker	Waterworks B3	Lurker must be shot before it can be scanned
Spitter / Corroder / Burster / Armored Mass / Glowtick	Containment F1–F2 / B1	Radiation-zone family
Flea Vessel / Chest Hugger / Swarmer / Swarmer Hive / Hive Carrier	Ventilation F2–F3	Hive family — scan the hive itself
Infected Patient / Infected Doctor / Head Crawler	Infirmary F1	Optional area — see Morgue Dweller
Infected Reactor Worker	Reactor B3	—
Unformed Specimen A / B	Lower Levels F1	—
Security Turret / Pod Type-A / Type-B / Type-C	Maintenance F1, Factory West F1, Lower Levels B4	Turret and Type-B both sit in Maintenance
Captain	NPC — final boss arena, upper-right corner	Scannable during the fight if missed
Soldier C-12	NPC — Comms F1, room right of the F2 lift	Post-game catch-up spot
Soldier O-14	NPC corpse — Outer Sector B2	On the Support Gun route
Soldier E-19	NPC corpse — room before the final boss	Story-adjacent

The nine boss entries (Husk Cluster through Fractured Being) fill themselves — strategy for each in all bosses.

All 51 notes

Sorted by zone — grab them on the shuttle sweep. Entries needing a keycard or tool are flagged.

Zone	Notes
Outer Sector B2	Cholmite Infestation · Incoherent Note (charge the floor outside Maintenance’s south safe room)
Habitation F1–F4	New Orders · Worker B-4212 (Janitor Key) · Worker B-5256 (Block B Keycard) · Worker A-1431 ×2, Worker A-1919 (Block A Keycard)
Infirmary F1–B1	X-Ray, Medical Examiner Note, Medical Journal, Autopsy Results (Restricted Access Keycard; Medical Examiner needs a blown wall)
Factory East F2–F3	Maintenance Log 45-D · New Security Rifles
Factory West F2–F4	Floor Integrity · Important Worker Notice · Incident Report 252-B · Meeting Notes (F4 lift — Executive Level Access)
Maintenance F1	Incident Report 143-A (charge the floor, drop down)
Ventilation F1–F3	Service Log 71-L-01 · 71-L-02 · Emergency Service Order
Reactor F1–B3	No Entry · Reactor Safety Notice · Reactor System Status · Security System Diagnosis (Service Access Card) · Scribbled Note (grapple the ladder)
Waterworks B2–B3	Pump System Operations Manual · Waterworks Accident Report · Disgruntled Note (stairs at sewers’ end)
Containment F2–F3, B1	Temporary Repairs Notice · Glowing Bugs · Grappling Hook Blueprint · Where Are These Bugs Coming From?! · Radiation Levels Report · Unauthorized Absence (charge the wall) · Worker B-2879, Scratched Note (B1)
Lower Levels F1–F2	R&D Report R-31 · Specimen 01 S-01 & S-05 · Prototype PD-09, Safe Access Record (trap door) · Scientist S-2476 · Experimental Module (Level 2) · Scientist Note & I’m Getting Out of Here (Level 3)
Lower Levels B2–B4	Mainframe Report (B3) · Server Worker Note, Prototype TP-02 (B2 lift — burn the growth on the switch) · Where Is Everyone (B4 tunnels)

Route it once

The clean sweep: finish the story, then run a shuttle loop — Outer Sector (Support Gun route) → Habitation → Comms → Factory East/West → Maintenance → Ventilation → Reactor → Waterworks → Containment → Infirmary → Lower Levels — scanner out the whole way. Every remaining entry lands in that single pass alongside the data shards and cheat codes. Map context for the loop: areas guide.