Health

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This is a technical page, which may have unmarked spoilers.

Technical pages document the mechanics of Rain World in much greater detail than is necessary to know for most purposes.

Technical pages may also make use of terms defined in the technical glossary.

Most creatures have some amount of health, which is part of what determines when a creature dies.

Overview

Most creatures have a certain maximum health and stun resistance which never change. Stun resistance acts as a divisor; a stun resistance of 2 halves stun duration. Some creatures also have an instant death threshold, the ramifications of which are discussed in the relevant section.

When a creature is first spawned, its current health is set equal to its maximum. Except a few cases, health does not regenerate during a cycle. Slugcat recovers all lost health at the end of a cycle, and most other creatures recover 25% health.

When violence is enacted upon a creature, its current health may be reduced and it may be stunned or killed, depending on the properties of the violence.

Although Slugcat has health, it can only be reduced by Spears or ✔️DLC Lilypucks. When Slugcat is attacked by most creatures, they simply have some random chance to die.

Resilience by Creature
Creature Maximum Health Stun Resistance Instant Death Threshold
Slugcat 1.0[1] 1.0 1.0
Overseer 0.9 0.5 1.0
Green Lizard 5.0 2.5 None
Pink Lizard 2.0 1.0 None
Blue Lizard 1.0 0.5 None
White Lizard 1.8 0.9 None
Black Lizard 2.0 1.0 None
Yellow Lizard 1.6 0.8 None
Cyan Lizard 1.8 0.9 None
Red Lizard 6.0 3.0 None
Salamander 2.0 1.0 None
Batfly None 0.2 0.15
Squidcada 0.8 1.0 None
Snail 0.4 0.8 1.0
Red Leech None 0.1 0.1
Sea Leech None 0.1 0.2
Pole Plant 0.9 0.5 1.0
Monster Kelp 2.5 0.8 None
Garbage Worm None 1.0 None
Scavenger 1.1 1.3 1.5
Vulture Grub 0.3 0.3 0.6
Vulture 8.5 3.5 None
King Vulture 12.5 6.5 None
Infant Centipede 1.0 None 1.0
Adult Centipede 0.69–12[2] 0.6 None
Red Centipede 13.3 0.6 None
Centiwing 2.31–3.20[2] 0.6 None
Grappling Worm 0.3 0.3 1.2
Hazer 0.3 0.3 0.6
Lantern Mouse 0.5 0.4 1.0
Coalescipede None 0.1 0.1
Big Spider 0.6 0.5 1.0
Spitter Spider 1.1 0.6 None
Miros Bird 7.0 2.75 None
Brother Long Legs 100.0 2.0 None
Daddy Long Legs 200.0 200.0 None
Rain Deer 200.0 8.0 None
Eggbug 0.15 0.3 0.7
Dropwig 0.95 0.6 None
Infant Noodlefly 0.2 0.4 None
Adult Noodlefly 0.4 1.0 1.2
Jetfish 0.95 0.9 1.0
Leviathan 1000.0 1000.0 None
Guardian 10000000.0 10000000.0 None
  1. Slugcat only takes damage from Spears and ✔️DLC Lilypucks, and only with ✔️DLCMore Slugcats Expansion enabled.
  2. 2.0 2.1 Depends on size.

Resilience by Creature
Creature Maximum Health Stun Resistance Instant Death Threshold
Slugcat NPC 1.0 1.0 1.0
Caramel Lizard 5.0 2.5 None
Strawberry Lizard 2.4 1.2 None
Train Lizard 8.0 4.0 None
Eel Lizard 1.6 0.8 None
Jungle Leech None 0.2 0.2
Elite Scavenger 2.2 1.3 3.5
Chieftain Scavenger 4.0 1.3 4.0
Aquapede 1.88–6.53[1] 0.6 None
Mother Spider 1.1 0.6 None
Miros Vulture 20.0 5.0 None
Inspector 1.0 5.0 None
Mother Long Legs 400.0 4.0 None
File:Hunter Long Legs icon (custom).png Hunter Long Legs 50.0 2.0 None
Firebug 1.4 1.3 4.0
Stowaway 0.8 2.0 None
Yeek 0.5 0.2 1.0
Giant Jellyfish 2.0 0.6 None
  1. Depends on size.

Death

Causing a creature to die is not as simple as reducing its health to 0; creatures can live on at negative health. Most creatures can die one of four ways: bleedout, instant death, quick death, and direct death.

Bleedout

When a creature's health is below 0, they enter bleedout. Each frame that a creature is in bleedout, they have a chance to die which depends on their current health - the further below 0 their health is, the most likely their death.

Chance per second to die at...
Creature 0% health -50% health -100% health
Centipedes 2.63% 42.62% 90.64%
Dropwig (stunned) 0% 42.49% 65.45%
Dropwig (not stunned) 0% 63.44% 78.04%
Squidcada 96.92% 98.14% 98.88%
Big Spider
Eggbug
Lantern Mouse
Spitter Spider
✔️DLC Firebug
✔️DLC Mother Spider
0% 63.44% 86.81%
All other creatures 0% 39.54% 63.68%

Bleedout never guarantees a creature's death, although death becomes arbitrarily likely with enough time. Most creatures with health can bleed out if they do not first die another way. Batflies, Coalescipedes, Leeches, Garbage Worms, and Slugcat cannot bleed out.

Instant death

If a creature takes more damage than their instant death threshold from a single act of violence, they suffer an instant death. Not all creatures can suffer instant death, but most smaller creatures, including Slugcat, can. Most instant death thresholds are around 1.0 - the same as the damage dealt by a Spear thrown by Survivor.

Quick death

If a creature receives violence which leaves their health at zero or less, they may suffer a quick death. For most creatures, as health varies from 0% to -100%, the chance that violence causes a quick death varies from 33% to 100%. Dropwigs' chance of quick death varies from 66.5% to 100% instead.

Slugcat can suffer a quick death if damage from Spears or ✔️DLC Lilypucks accumulates to 1.0 or more - in which case they have a 100% chance to die regardless of health.

Some creatures cannot suffer quick death: Batflies, Centipedes, Coalescipedes, Garbage Worms, Leeches, Lizards, and ✔️DLC Giant Jellyfish.

Direct death

Any death not falling into one of the above categories is a direct death which bypasses health and resistance. Following are some examples of direct death.

  • If an air-breathing creature runs out of air underwater, they may die (although Slugcat first enters a drowning state).
  • If a creature that cannot fly falls below the lower bound of a room, it dies.
  • If a creature that can fly falls below the lower bound of a room while stunned, it dies.
  • If the mass of all Coalescipedes grabbing a creature exceeds that creature's mass, the creature dies.
  • If a creature collides with the core of a mobile Rot cyst while at least one of its tentacles is holding that creature, the Rot begins digesting them. After 1 second of digestion, the creature dies.
  • If a creature is caught by a Leviathan's bite, it dies.
  • Once the pull of Worm Grass on a creature becomes strong enough, the creature dies. Some creatures, like Rain Deer, are grabbed but not pulled by Worm Grass.
  • Once a creature is held by Proto Long Legs for long enough, it dies.
  • ✔️DLC If a creature contacts the core of a Giant Jellyfish, it dies.
  • ✔️DLC If a creature is within 350 units of a Singularity Bomb when it detonates, it dies.
  • ✔️DLC If a creature is sufficiently submerged in the acid of Garbage Wastes, it dies (although Artificer may survive if they aren't overheating).
  • ✔️DLC If a creature is stunned for long enough while sufficiently hypothermic, it dies. Severe hypothermia itself can cause such a stun.

The following are only applicable to specific creatures:

Trivia

  • Internally, health actually starts at 1.0, or 100%, for all creatures. What is described here as health for most creatures is the effective health when accounting for baseDamageResistance, which divides all incoming damage.