What the file actually contains
The bestiary table behind this site lists 25 entities, split 16 indoor and 9 outdoor, and 18 of them carry a Sigurd hazard rating in percent. That is the whole of the hard data most guides wave at you without ever reading. This page reads it.
Every number below comes from src/data/lethalcompany-monsters.json, parsed from the Bestiary tables on the Lethal Company wiki and cached locally. Nothing here is estimated. If a column in that file is empty, this guide says so instead of inventing a figure.
The first thing the data tells you is uncomfortable: the danger is not evenly spread. The median indoor rating is 70%. The median outdoor rating is 2%. Same game, same day, same crew.
The hazard table, worst first
Eighteen entities have a usable number. Sorted from highest to lowest:
| Entity | Hazard | Location | Scientific name |
|---|---|---|---|
| Maneater | 1000% | Indoor | Periplaneta clamorus |
| Jester | 90% | Indoor | INSANEUS THINGUS |
| Thumper | 90% | Indoor | Pistris-saevus |
| Circuit Bees | 90% | Outdoor | Crabro-coruscus |
| Coil-head | 80% | Indoor | Vir colligerus |
| Baboon Hawk | 75% | Outdoor | Papio-volturius |
| Bracken | 70% | Indoor | Rapax-folium |
| Butler | 70% | Indoor | N/A |
| Forest Keeper | 50% | Outdoor | Satyrid-proceritas |
| Snare Flea | 30% | Indoor | Dolus-scolopendra |
| Bunker Spider | 20% | Indoor | Mutinum-ficedula |
| Spore Lizard | 5% | Indoor | Lacerta-glomerorum |
| Earth Leviathan | 2% | Outdoor | Hemibdella-gigantis |
| Tulip Snake | 1% | Outdoor | Draco tulipa |
| Hoarding Bug | 0% | Indoor | Linepithema-crassus |
| Hygrodere | 0% | Indoor | Hygrodere |
| Manticoil | 0% | Outdoor | Quadrupes-manta |
| Roaming Locusts | 0% | Outdoor | Anacridium-vega |
Treat the Maneater’s 1000% as a joke the bestiary keeps in the table. It is not a probability, and it does not mean the Maneater is ten times worse than the Jester. Strip that one entry out and the top band is a clean 90% trio: Jester, Thumper, Circuit Bees.
The seven entities with no usable number
Seven entries carry N/A or ??? where the rating should be. They are the ones most guides quietly skip, because there is nothing to sort them by:
| Entity | Hazard field | Location |
|---|---|---|
| Barber | N/A | Indoor |
| Nutcracker | N/A | Indoor |
| Eyeless Dog | N/A | Outdoor |
| Old Bird | N/A | Outdoor |
| Ghost Girl | ??? | Indoor |
| Mask Hornets | ??? | Indoor |
| Masked | ??? | Indoor |
A blank rating is not a low rating. It means the bestiary does not assign this entity a danger band at all, which is what you tend to see with conditional or scripted threats. Do not read “N/A” as “safe”. Read it as “no number to plan with, so plan for the worst”.
The Nutcracker is the clearest example. Its hazard field is empty, but the same row lists a power of 1, an HP of 5, one hitbox and a max of 10 — the highest spawn cap in the file. An entity that can appear ten times over deserves attention regardless of what the danger column says.
The three rows that carry combat data
Only three entities in the whole file have their combat columns filled in. That is the entire quantitative basis for “can I kill this?”
| Entity | Power | Stunnable | HP | Hitboxes | Max |
|---|---|---|---|---|---|
| Bracken | 3 | Yes | 5 | 2 | 1 |
| Jester | 3 | Yes | Invincible | 2 | 1 |
| Nutcracker | 1 | Yes | 5 | 1 | 10 |
Three readings follow straight from that table.
The Bracken and the Jester share the top power value of 3, and they are the only two entries with it. Both are listed as stunnable, and both cap at 1 spawn, so you will never face two at once.
The Jester’s HP field reads “Invincible”, which is the file telling you not to plan a fight. Its own log entry is blunt: “You cant hide from it, just evacuate.” That is the most useful sentence in the bestiary, and it comes from the entity’s own record rather than a forum post.
The Nutcracker has 5 HP and one hitbox — the cleanest kill profile in the game, and the only entry with a max above 1. A stunnable, single-hitbox, 5 HP enemy that spawns up to ten times is a fight you can actually take, provided you are not doing it in a dead-end corridor with a second one behind you.
Indoor versus outdoor, by the numbers
Sixteen entities are tagged Indoor. Nine are tagged Outdoor. The counts hide the real split:
- 6 of 16 indoor entities rate 70% or higher — Bracken, Butler, Coil-head, Jester, Maneater, Thumper.
- 2 of 9 outdoor entities rate 70% or higher — Baboon Hawk and Circuit Bees.
- 4 of 9 outdoor entities rate 2% or below — Earth Leviathan, Tulip Snake, Manticoil, Roaming Locusts.
- Indoor median 70%, outdoor median 2%.
Translation: the surface is a transport problem, the facility is the fight. Outside you lose time, distance and line of sight. Inside you lose the run.
That is why the outdoor list reads like weather and the indoor list reads like a casualty report. It also explains a pattern every crew discovers the hard way — most wipes happen after the loot is already collected, on the way out, in a corridor.
The four-entity shortlist
If you memorise nothing else from 25 rows, memorise these four, because they cover the top of every column in the file.
Jester — 90%, power 3, invincible, max 1. The only entity the data calls unkillable. There is no loadout answer, only leaving. See the Jester fight breakdown.
Thumper — 90%, Pistris-saevus. Tied for the highest serious indoor rating, with no HP column filled in, which means no documented kill threshold. Treat it as a chase, not a duel. The Thumper guide covers the route-out approach.
Coil-head — 80%, Vir colligerus. Second-highest indoor number after the 90% band, high enough that a corridor meeting should end in a retreat rather than a shovel swing.
Bracken — 70%, power 3, HP 5, two hitboxes, max 1. The only high-hazard entity with a full stat line. Five HP across two hitboxes is a real fight, but its own log warns that it escalates when watched: “brackens are known to up their hostility when cornered or simply watched for a long time.” Glance, do not stare. Full method in the Bracken guide.
How to read a bestiary row in ten seconds
Order matters more than the values. Read left to right and stop at the first thing that decides the encounter.
- Hazard — above 70%? The plan is avoidance, not combat.
- Location — Indoor means a corridor, which means no escape lane. Outdoor means open ground, which means you can keep running.
- Stunnable — only three rows have this field filled. Blank is not “no”.
- HP — three rows only. A filled HP is permission to fight; an empty one is not.
- Max — anything above 1 can stack. The Nutcracker’s 10 is the only entry that does.
Two of those five checks resolve most encounters before you have moved. A 90% indoor entity with no HP field is not a puzzle to solve mid-corridor. It is a direction to walk away from.
Where the numbers stop helping
The bestiary is a table of spawn-side danger, and it is honest about its own gaps: 7 of 25 rows have no rating, 22 of 25 have no HP value, and 22 of 25 have no stun flag. Those gaps are why crews still die to entities they “know”.
Use the table for the decisions it can settle — which band a threat sits in, whether it can stack, whether a kill is documented — and use route discipline for everything else. The monster database has all 25 rows with the raw columns if you want to check a specific entry, and the scanner and bestiary guide covers reading entries in-run.
Related guides
- Indoor monsters — the 16 facility entities and why their median rating is 70%.
- Outdoor monsters — the 9 surface entities, four of which rate 2% or lower.
- Monster database — all 25 rows, raw columns, sortable.
- Survival guide — exits, weight and the walk back.
- Best weapons — what actually interrupts a 70%+ entity.