Oxygen Not Included Wiki
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Duplicant
This article has not been revised for the current version (U51-600112). It was last updated for U46-552078. It may contain inaccuracies.
This article has not been revised for the current version (U51-600112). It was last updated for U46-552078. It may contain inaccuracies.

Eggs are laid by critters. The subspecies of an egg can be different than the critter that laid it, with the chances for various subspecies be influenced by various conditions. An egg can either hatch into a new critter or be processed into Raw Egg at an Egg Cracker and then cooked into an Omelette at an Electric Grill. That process can be automated by letting the egg crack in a storage and cooking the egg to an omelette by heating it up above 70°C

Egg Weights[ | ]

The following list is of use to players who intend to use Weight Plate to weigh eggs. When cracked, eggs will output half their mass as Egg Shell and half their mass as Raw Egg.

Egg Type Weight (g) Remark
Shine Nymph Egg Shine Nymph Egg 200 Wild Shine Bug Eggs are the most accessible of them, but they are rather light.
Sun Nymph Egg Sun Nymph Egg 200
Royal Nymph Egg Royal Nymph Egg 200
Coral Nymph Egg Coral Nymph Egg 200
Azure Nymph Egg Azure Nymph Egg 200
Abyss Nymph Egg Abyss Nymph Egg 200
Radiant Nymph Egg Radiant Nymph Egg 200
Hatchling Egg Hatchling Egg 2000 You have to be willing to spare the Hatches that you find early in the game, feed them and wait for them to lay eggs.
Sage Hatchling Egg Sage Hatchling Egg 2000
Stone Hatchling Egg Stone Hatchling Egg 2000
Smooth Hatchling Egg Smooth Hatchling Egg 2000
Fry Egg Fry Egg 4000 These can be had if you have your Duplicants poke into pools in the Swamp Biome and get themselves wet. Fortunately, for them, Pacu won't defend their eggs. Remember to seal those pools later.
Tropical Fry Egg Tropical Fry Egg 4000
Gulp Fry Egg Gulp Fry Egg 4000
Drecklet Egg Drecklet Egg 2000 Wild Dreckos often live in places with non-oxygen gases, especially Chlorine and Hydrogen. Breaking into their habitats might require preparation.
Glossy Drecklet Egg Glossy Drecklet Egg 2000
Pinch Roe Pinch Roe 2000
Oak Pinch Roe Oak Pinch Roe 2000
Sani Pinch Roe Sani Pinch Roe 2000
Pip Egg Pip Egg 2000
Cuddle Pip Egg Cuddle Pip Egg 2000
Puftlet Egg Puftlet Egg 500
Puftlet Prince Egg Puftlet Prince Egg 500
Dense Puftlet Egg Dense Puftlet Egg 500
Squeaky Puftlet Egg Squeaky Puftlet Egg 500
Larva Egg Larva Egg 2000
Molten Larva Egg Molten Larva Egg 2000
Longhair Larva Egg Longhair Larva Egg 2000
Shove Vole Egg Shove Vole Egg 2000
Delecta Vole Egg Delecta Vole Egg 2000

Taming and making sure a large population of critters remains happy is the most efficient way of going about getting eggs. However, make sure your economy can support feeding them all.

Mechanics[ | ]

  • Assuming a critter never has the "glum" debuff, a wild critter will lay one egg from birth to death, while a tame critter will lay sixteen eggs from birth to death via old age. Wild critters can become glum due to being confined in a small space, while tame critters can become glum due to overcrowding or not being groomed often enough.
  • If there is at least one egg in a stable and the number of eggs plus the number of critters is larger than the stable's maximum capacity then the critters will receive the Cramped debuff, preventing them from generating more eggs; eggs inside a Ration Box or refrigerator inside the stable count towards this limit. The Cramped debuff will only go away once enough eggs hatch or are removed from the stable.
  • Eggs maintain the wild/tame status of their parent upon hatching. That is, the eggs of tame critters will hatch into tame babies, and the eggs of partially tamed wild critters will hatch into partially tamed babies. Once tamed critters can not go back to wild.
  • Hatch will take 20 cycles to birth if left outside or 4 cycles if in an incubator. Each critter has its own time.
  • If eggs are put in e.g. a Storage Bin or transported via a Conveyor Rail, they will become non-viable after 10 cycles, so they will crack up and turn into Raw Egg and an Egg Shell.
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