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This article may contain outdated information that is inaccurate for the current version (Quality of Life Upgrade MK III). It was last updated for the Quality of Life Upgrade MK II.

Biomes are regions in Oxygen Not Included. There are several different biomes in the game. Each contains different resources, creatures, and plants, and are mostly separated by veins of Abyssalite. Although each biome has a color shading applied to it that stays after the biome is mined out, there are no special properties beyond the contents of the biomes (so, for example, the Frozen biome does not cool itself, only starting out cold and cooling through Wheezeworts, which can be removed).

Default Biomes Contents[edit | edit source]

Biome Location Metal Rock Other Solids Liquid Gases Life Border
Temperate Spawning area (Map center) Copper Ore Sandstone DirtAlgaeSandCoalFertilizerOxylite Water OxygenCarbon Dioxide HatchShinebug
Bluff BriarBristle BlossomMealwoodMuckroot
Swamp Near Spawn Gold Amalgam Sedimentary Rock SlimeAlgaeClayCool Steam VentNatural Gas GeyserOxylite Polluted Water Polluted OxygenCarbon Dioxide PuftPacuThimble ReedDusk Cap AbyssaliteNeutronium
Caustic Near Spawn Iron Ore Igneous Rock PhosphoriteAlgaeBleach StoneCoalCool Steam VentNatural Gas GeyserChlorine Gas Vent Oxylite None ChlorineHydrogen MorbDreckoPincha PepperBalm Lily AbyssaliteNeutronium
Frozen Near spawn, but not adjacent Wolframite Granite IcePolluted IceSnow None OxygenCarbon Dioxide WheezewortSleet Wheat AbyssaliteNeutronium
Oil Above Volcanic Iron Ore Igneous Rock
DiamondObsidianFossilOil Reservoir Crude Oil Carbon Dioxide Slickster AbyssaliteNeutronium
Volcanic Bottom None None NeutroniumAbyssalite Magma None None Neutronium
Space Upmost Iron Mafic Rock RegolithGraniteIgneous Rock None None Shove Vole No-Go Zone

The above table shows only what is primarily generated in these biomes; there are some exceptions:

Helicona Biomes Contents[edit | edit source]

Biome Metal Rock Other Solids Liquid Gases Life Border
(Spawning area)
Copper Ore Sandstone DirtAlgaeSandCoalFertilizerOxylite Water OxygenCarbon Dioxide HatchShinebug
Bluff BriarBristle BlossomMealwoodMuckroot
Frozen Wolframite Granite IcePolluted IceSnow None OxygenCarbon Dioxide WheezewortSleet Wheat AbyssaliteNeutronium
Volcanic None None Neutronium Magma None None AbyssaliteNeutronium
Electrum ElectrumCopper OreIron Ore GraniteIgneous Rock Diamond None Vacuum None AbyssaliteNeutronium
Space Iron GraniteMafic RockIgneous Rock Regolith None Vacuum None AbyssaliteNeutronium
Void None None The Void None None None Neutronium

Biome Descriptions[edit | edit source]

Temperate Biome[edit | edit source]

The Temperate Biome is the place where Duplicants start. It contains clean Water, Dirt, Sandstone, Sand, Coal, Algae, and Copper (which provides a small decor boost). The Muckroot, Mealwood and Bristle Blossom plants growing naturally here will provide food until you research other Food options. The player is guaranteed to start with at least five accessible tiles of Oxylite, which should produce sufficient Oxygen for the Duplicants to survive until Oxygen generation structures have been researched. Algae found here will last for about 20 or more cycles after that. Shinebugs and Hatches are found only in this biome. The Temperate biome is bordered by a mixture of Granite and Obsidian, and is located in the center of the map, surrounded by the other biomes.

Swamp Biome[edit | edit source]

Swamps are warmer and have cavities full of Polluted Oxygen, often under high pressure. Pools of Polluted Water and dug up Slime will add even more Polluted Oxygen. Players can find more Algae here, useful if its still needed for Oxygen generation. The Slime can be converted to Algae as well. The primary rock is Sedimentary Rock, which can be mined quickly due to its low hardness. The Gold Amalgam found here is the most heat-resistant Metal Ore. Dusk Caps and Thimble Reed grow here, the latter of which is crucial for the production of Clothes.

Swamps can be a dangerous biome, due to the slime, which contains slimelung. Pufts and pacus can also be found in this biome.

Caustic Biome[edit | edit source]

This biome is even warmer than the Swamp Biome, and here the player can find Pincha Pepper plants that produce Pincha Peppernut for the Electric Grill, as well as Balm Lilies which can be used to make Vitamin Chews. The Chlorine and Hydrogen gases in the cavities here are unbreathable. The Bleach Stone found here is useful to keep the Duplicants happy with a Hand Sanitizer, and Phosphorite is used as a fertilizer for Pincha Pepper. Caustic biomes often have large veins of Coal, Igneous Rock, Algae, and Iron Ore (which has no special properties compared to other Metal Ores). Morbs can be found here as well. In one caustic biome, there will be either a single Chlorine Geyser, the only renewable source of Chlorine, or a second Natural Gas Geyser.Dreckos are often found in this biome near Balm Lily and Pincha Peppernut plants.

Frozen Biome[edit | edit source]

In this biome, Duplicants will become stricken with Hypothermia if not wearing a Warm Sweater which can be made in a Textile Factory. The temperature ranges from -20 to -40 °C. It contains large amounts of liquifiable Ice, Polluted Ice, and Snow, as well as veins of Granite and Wolframite (both notable for their excellent Heat transfer abilities). For gases, there's Carbon Dioxide and some Oxygen. Players can find Sleet Wheat and Wheezewort (plants) here. Frozen Biomes are not generated directly next to Temperate (starting) Biomes as of a recent update.

Oil Biome[edit | edit source]

It is located right above the volcanic biome. The temperature is ~80 °C (on the top) and up to 380 °C (on the bottom). It contains Crude Oil, Oil Reservoirs, veins of Diamond, Granite, Obsidian and Iron Ore and pockets of Natural Gas and Carbon Dioxide. It is inhabited by Slicksters.

Volcanic Biome[edit | edit source]

Volcanic biomes appear at the very bottom of the map. It only contains liquid Magma (about 1600 °C) and Neutronium which can't be destroyed.

Electrum Biome[edit | edit source]

Electrum biome appears on the top of the map in the first Helicona preset and in the second preset, it appears as world border. It contains huge pockets of Electrum and Vacuum. In Helicona 2 preset there occurs Iron Ore and Copper Ore is not completely surrounded by Neutronium.

Space Biome[edit | edit source]

The space biome can destroy all kinds of gases. It contains Mafic Rock, Regolith and Granite in the upper layers, and Igneous Rock can be found in the lower layers. Meteor Showers can randomly happen and bring refined Iron and Sand in item form and Regolith in block form.
Gases are sucked into the vacuum of space through the open background, and in the absence of gases heat can not dissipate from materials and objects. Adding Drywalls helps to construct rooms that can hold air.

Example of Helicona 1 layout of biomes. (the full map is a bit taller, this image contains most of it)
Example of Helicona 2 layout of biomes. (this is the full map of Helicona 2 world)

Gallery[edit | edit source]