The short version
Hygrodere is a slow blob that kills anything it touches. It is not fast and it is not clever.
Put a door between you and it. That is the whole answer, and it works because it cannot open doors.
What Hygrodere is
It is an indoor entity that looks like a mass of slime. It moves across floors and down corridors.
It is slow. That slowness is the reason this entity kills fewer crews than it should, and the reason crews get careless around it.
Contact is lethal. There is no health pool to trade against and no struggle once it reaches you.
Why slowness is a trap
Every crew instinct says a slow enemy is a safe enemy. That is half true here.
It is safe only while you have somewhere to go. A slow entity in a dead-end corridor is not slow any more. It is inevitable.
It also does not stop. It keeps coming, and it keeps tracking you, so time does not solve the problem the way it does with something that loses interest.
Treat it as a moving wall rather than a monster. Walls are harmless until you run out of room.
Doors are the counter
This is the single most useful fact about it.
It does not open doors. A closed door between you and Hygrodere ends the encounter immediately.
Close doors behind you as you move through a facility where one is present.
Do not stand in a doorway holding it open. Shut it and move on.
Know which doors you have already closed. Retreating along a route you shut behind you is the safest possible retreat.
Crews that close doors as they go almost never die to this. Crews that leave everything open treat every corridor as a race.
How to move past one
Sometimes the route you need has it in the way.
Check the width first. If there is room to pass at a distance, walk wide and keep going.
Do not back into a dead end. Look at where you are going, not only at where it is.
Keep your distance rather than your speed. You do not need to sprint. You need to not be touched.
If the corridor is narrow, turn around and take another route. Squeezing past is how divers die to a slow entity.
The failure case is always the same: a diver walks into a narrow space, meets it coming the other way, and has nowhere to go.
What not to do
A few responses make this worse.
Do not fight it. A shovel does not solve a contact-kill entity, and swinging means standing still within reach.
Do not corner yourself. Never retreat into a room with one exit while it is behind you.
Do not assume it lost interest. It keeps coming while you are in range.
Do not drop scrap to slow it. That is not how this works, and it costs you the haul.
The pattern is to keep an exit behind you at all times. That habit handles Hygrodere and most other things too.
When it is in the way of the exit
A blob sitting between the crew and the way out is a waiting problem.
Check for the second route. Most layouts have one, and this is exactly when it pays off.
Use the door you closed earlier. Route back through spaces you already secured.
Wait at a junction. It will drift. Slow entities do not hold a position forever.
Do not try to run through a narrow gap. Reach is the danger, not speed.
If the clock is not forcing you, patience wins. If the clock is forcing you, the second route is the answer, not the squeeze.
Team play
A crew handles this better than a solo diver, but only with discipline.
Call it once. “Slime, west corridor” tells everyone which route just closed.
Do not cluster in a narrow corridor. Spread out so the group is not trapped together.
Close doors as a habit. The diver at the back shuts doors behind the group.
Keep the ship player informed if the route home is affected. They can often see alternatives.
None of this is complicated. It is the same lesson the whole game teaches: keep an exit, and do not get cornered.
Mistakes that get people killed
- Backing into a dead-end room. The classic Hygrodere death.
- Leaving every door open. Doors are the counter and they are free.
- Trying to squeeze past in a narrow corridor. Turn around instead.
- Fighting something that kills on contact. Do not stand within reach to swing.
- Assuming slow means harmless. Slow only matters if you have somewhere to go.
Reading it in the bestiary
Hygrodere is one of the 16 indoor entities in the monster database. That table lists every entity with its location and hazard rating where the source data provides one.
Our source data does not populate hazard or health for many entities. We describe behaviour rather than invent numbers, because the behaviour is the counter here.
Related guides
- Indoor monsters guide — all 16 facility entities and how they differ.
- Map guide — second routes, and why they matter here.
- Survival guide — exits and not getting cornered.
- How to beat Snare Fleas — another entity solved by looking where nobody looks.