Biomes in Oxygen Not Included | Resources Oxygen Not Included Guide

Last update: 09 August 2019

Starting biome. It's the area where you begin the game, and its layout is similar each time: a few bodies of water and caves with plants and numerous Algea. Additionally, you'll find here significant amounts of sand, as well as earth, coal, and copper ore. It's got the most optimal temperatures for your duplicants. This zone is the only one not separated from others by a thick wall of Abyssalite.

Gree/Toxic biome. A very warm area, full of animals, and featuring numerous bodies of water (both polluted and clean). You'll also find geysers and impressive amounts of Slime. That's why the air in this biome is mostly polluted, although there are some pockets of clean air to be found as well. One thing unique to this biome is gold ore, which cannot be found outside of this area.

Purple/Hot. It's one of the hottest, and at the same time most hostile areas for your duplicants. Caves filled with chlorine or hydrogen are a common occurrence. Sometimes, you can encounter Morbs, which transform said gases into polluted air. It's the only area where you can find Bleach Stone and iron ore deposits.

Blue/Winter. This biome is characterized by below zero temperatures. It's separeted from the others with a wall of Abyssalite, which enables it to preserve its conditions. Inside you'll find deposits of ice and snow, which can be melted to obtain water. It's also the only place where you can find Wolframite and several unique plants, such as Sleet Wheat.

Volcanic. It's the hottest biome, always located at the bottom of the map. As the storage of hot magma, it's a great place to convert polluted water into steam or melt other resources.

Electric/Purple. You will find it at the top of the world. There you can find Electrum that can be forged into gold. Frequently, there are also iron and copper depots there. The temperature is comfortable, but the area lacks oxygen.

Acidic/green-pink. This biome is filled with caves with various poisonous gases. High temperatures and bad air conditions make it harder to explore this biome. Here you can find Pincha Peppemut.

Cosmic/White-blue. In this biome, you won't find any gases. Each attempt at transporting oxygen or other gas into it will end in failure - the biome destroys all gases. While exploring this biome, you must watch out for flying comets that can damage the duplicants. There are three types of comets: Dust, Iron, and Metheor. Each of them creates a different resource after landing. Dust creates sandstorm, iron created iron, and metheor creates regolith.