Oxygen Not Included Wiki

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Oxygen Not Included Wiki
This article contains outdated information that is inaccurate for the current version. It was last updated for CS-442154. Unreflected changes in the discussed game mechanics are detailed here: EX1-444349 • FA-471618 • FA-472345 • U35-479045 • U36-481350 • U37-483944 • U38-486708
This article contains outdated information that is inaccurate for the current version. It was last updated for CS-442154. Unreflected changes in the discussed game mechanics are detailed here: EX1-444349 • FA-471618 • FA-472345 • U35-479045 • U36-481350 • U37-483944 • U38-486708
This article is related to content of the Base Game. There may be a version for the "Spaced Out!" DLC, see Critter (Spaced Out).

Critters are aliens that lay eggs and some species produce materials and/or drop meat when dying. Ranching can be used to increase the number of critters, eggs, and materials. Some critters have different morphs which consume different foods, live at different temperatures, or produce different products.

List of Critters[]

Image Name Diet Produces Egg Drops Stable Limit Note

Sage Hatch Stone Hatch Smooth Hatch

Hatch Food, Raw Mineral, Organic, Metal Ore Coal,
Refined Metal
Hatchling Egg

Sage Hatchling Egg Stone Hatchling Egg Smooth Hatchling Egg

Meat 8 Will burrow in soft ground during the day, but will stay active if it can't find a place to burrow.
Shine Bug

Sun Bug Royal Bug Coral Bug
Azure Bug Abyss Bug Radiant Bug

Shine Bug Food,
Shine Nymph Egg

Sun Nymph Egg Royal Nymph Egg Coral Nymph Egg
Azure Nymph Egg Abyss Nymph Egg Radiant Nymph Egg

None 8 Floating/hovering critter, provides a constant source of light and +30 decor in its immediate vicinity. Nice to have in one's base due to the light and decor bonuses. Small health pool and only a small number spawn.

Cuddle Pip

Pip Arbor Trees, Thimble Reed Dirt Pip Egg

Cuddle Pip Egg

Meat 8 (Pip)

24 (Cuddle Pip)

Plants loose seeds into soft blocks and can knock items out of storage bins. Cuddle pips hug eggs and dupes, speeding up incubation.

Glossy Drecko

Drecko Balm Lily,Pincha Pepper,Mealwood Phos-phorite,
Reed Fiber, Plastic
Drecklet Egg

Glossy Drecklet Egg

Meat 8 This creature can be found crawling around in cavities in the Caustic Biome. They are able to cling strongly to any surface, and will freely wander the full perimeter of whatever chamber they are in. They are not hostile and are quite mobile, inevitably wandering away from any chamber they are not trapped in.
Pokeshell Rot Piles,
Polluted Dirt, Slime
Pokeshell Molt, Oakshell Molt
Pinch Roe
Oak Pinch RoeSani Pinch Roe
Pokeshell Molt, Oakshell Molt, Raw Shellfish 8

Puft Prince Dense Puft Squeaky Puft

Puft Polluted Oxygen/ Oxygen/Chlorine Slime/ Oxylite/ Bleach Stone Puftlet Egg

Puftlet Prince Egg Dense Puftlet Egg Squeaky Puftlet Egg

Meat 6 Floating/hovering critter. Its movement is based on invert pyramid shape, moves center to top, left then right, follows bubbles of contaminated air, prefers going up. Sucks in the closest air bubble, goes up into top of room/chamber on borders of gases then spits out slime. Can follow its own slime consuming again. Won't go under water, but can enter a stream of water from below or from the side (and then die).

Tropical Pacu Gulp Fish

Pacu Algae/ Plant Seeds Polluted Dirt Fry Egg

Tropical Fry Egg Gulp Fry Egg

Pacu Fillet 12 Swims in water, can only be caught via a Fish Trap.

Longhair Slickster Molten Slickster

Slickster Carbon Dioxide/Oxygen Crude Oil/Petroleum Larva Egg

Longhair Larva Egg Molten Larva Egg

Meat 8 Floats over the floor or liquid, and follows spots of carbon dioxide.
Shove Vole

Delecta Vole

Shove Vole Regolith/ Dirt/ Iron Ore Solid Tile/Tonic Root Shove Vole Egg

Delecta Vole Egg

Meat Burrowing critters that eat the Regolith collected on terrestrial surfaces.
Gassy Moo Gassy Moo Gas Grass Natural Gas none Meat 6 Extraterrestrial creatures that feed on gas grass and excretes natural gas.
Morb Morb none Polluted Oxygen none Polluted Oxygen Spawns from full Outhouses if it filled long enough but can be found naturally, produces contaminated oxygen unless in high-pressure gas, explodes in a puff of Polluted Oxygen or Chlorine upon death. Cannot be Ranched.

Critters in DLC[]

See: Critters in Spaced Out

Common traits[]

Most critters share the following traits:

  • Are not aggressive (with exception of Pokeshell, which will attack anything if there are any of their eggs nearby).
  • Occupy one tile and can crawl into narrow spaces (except adult Pokeshells).
  • Will die when subjected to temperature extremes (specific range depends on species). Tend to migrate to livable temperature zone accessible to it.
  • Can live in any atmosphere including Vacuum, yet will drown in liquids (but will try to escape), with exception of Pacus and Pokeshells.
    • Common critters, such as hatches, will drown in
      • 1) a liquid tile with a mass difference less than 50kg to the element's critical mass(the maximum mass for a natural liquid tile), i.e. a water tile with over 950kg of mass, or,
      • 2) any liquid environment that is over 2-tiles deep, i.e. in a 10g water tile with any amount of petroleum on top of it.
    • On the other hand, Pacus will be reduced to the flopping state in absence of water(or some other liquids they can live in).
  • Both wild and tamed critters age, lay eggs, and have a capped life expectancy (with exception of Morbs, those have no life-cycle, and Gassy Moos, which lay no eggs).
  • Juvenile critters take 5 cycles to grow into an adult.
  • A wild critter does not need a diet. Once tamed they will begin to lose calories and starve if not fed after a number of cycles. A tamed critter with "glum" debuff loses calories slower than a happy tamed critter.
  • Tamed critters lay tamed eggs. Babies won't starve and don't require a diet. Once matured, tamed critters need a stable food supply to survive.
  • Wild critters usually always stay happy, if they have enough space.
  • Resource conversion can range twentyfold depending on critter status. Happy and Tamed Critters have 100% production, Wild has 25%, Glum has 20%. Wild and Glum has only 5% production rate. See also: Metabolism
  • Can't use ladders for pathfinding purposes, but can pass through opened pneumatic doors, and walk on opened horizontally placed doors. Drops only at the moment a door opens. Can get confined when a tile is built on top of them or were idle in a closing door.
  • Can arrive as a care package by Printing Pod (except Morbs and Gassy Moos).
  • They drop meat or whatever material when they die, no matter of how this happens (being killed by a duplicant, dying of old age, drowning, ...). Killing a Juvenile critter will grant the same amount of output.

Hatch and Morb, as walking critters, share the traits:

  • Can walk, jump across 1 tile gaps, climb diagonally 1 tile, and jump up diagonally 1 tile to left/right and 2 tiles up/down.
  • Babies can't jump tile gaps, or up/down.
  • Non-aquatic critters sometimes jump into a puddle of liquids that's less than 1 tile thick.

External links[]