Is Oxygen Not Included co-op?

Not natively. Oxygen Not Included ships single-player; the community mod Oxygen Not Included Multiplayer adds co-op — Shares one colony between players. Playable and improving, but expect desyncs on big bases.

Does Oxygen Not Included have PvP?

Only with the Oxygen Not Included Multiplayer mod, which is co-op only.

Do we both need to own Oxygen Not Included to play together?

Yes. Oxygen Not Included is played online, so each player needs their own copy on their own Steam account (or PC Game Pass where it is offered). Steam Families can share a library, but two people cannot play the same shared game at the same time.

How many people play Oxygen Not Included?

About 7,545 players were in-game when this page's data was last refreshed (2026-09-09).

Ready Up — what game do we play?Compare two Steam libraries →

Multiplayer games › Strategy › Builder & management

Is Oxygen Not Included multiplayer? Yes — with Oxygen Not Included Multiplayer

Not out of the box — but the Oxygen Not Included Multiplayer mod makes it co-op. Oxygen Not Included is a builder & management game released in 2019, 97% positive on Steam (128,390 reviews), with 7,545 playing right now. $24.99 on Steam.

Co-opSingle-player tooMultiplayer via mod: Oxygen Not Included MultiplayerStrategy · Builder & management

How to play Oxygen Not Included with a friend: Oxygen Not Included Multiplayer

Shares one colony between players. Playable and improving, but expect desyncs on big bases. Steam lists Oxygen Not Included as single-player, so it won't show up in Steam's own "games we both own" view as something you can play together — Ready Up counts it anyway, marked "Via mod", and you can hide mod-only games with one filter if that's not your thing.

Players: 2+
Modes: co-op
Status: Beta — playable, rough edges, expect bugs
You need: One host; Steam or direct connection
Price: Free

Get Oxygen Not Included Multiplayer All 77 games with multiplayer mods →

Oxygen Not Included is a space-colony simulation game. Deep inside an alien space rock your industrious crew will need to master science, overcome strange new…

How Oxygen Not Included plays with friends, according to Steam

Online co-op: Not listed on Steam
Local / split-screen co-op: Not listed on Steam
Online PvP: Not listed on Steam
LAN play: Not listed on Steam
Single-player mode: Yes

Steam's own category list for the game, as of 2026-09-09. "Not listed" means the store page does not claim that mode; community mods or Remote Play can still add it.

Steam tags: Colony Sim, Base-Building, Survival, Resource Management, Building, Singleplayer, Management, 2D

Do you and a friend both own Oxygen Not Included?

Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether Oxygen Not Included is one of them — then helps you pick tonight's game with a weighted roll or a bracket.

Or open the Steam store page.

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Tired of Oxygen Not Included? The Swap tab finds the closest unowned games of the same type that are newer or rated higher.

Quick answers

Is Oxygen Not Included co-op?: Not natively. Oxygen Not Included ships single-player; the community mod Oxygen Not Included Multiplayer adds co-op — Shares one colony between players. Playable and improving, but expect desyncs on big bases.
Does Oxygen Not Included have PvP?: Only with the Oxygen Not Included Multiplayer mod, which is co-op only.
Do we both need to own Oxygen Not Included to play together?: Yes. Oxygen Not Included is played online, so each player needs their own copy on their own Steam account (or PC Game Pass where it is offered). Steam Families can share a library, but two people cannot play the same shared game at the same time.
How many people play Oxygen Not Included?: About 7,545 players were in-game when this page's data was last refreshed (2026-09-09).

Ready Up is a free tool: enter two Steam usernames and it lists the multiplayer games you both own, runs a bracket to pick one, and suggests new co-op games that fit how you both play. Ratings, tags and player counts from Steam and SteamSpy; page updated 2026-09-23. Powered by Steam — not affiliated with or endorsed by Valve Corporation or Microsoft. Ready Up is a Somebody Decide program. How the data works · Legal & privacy · All types · Game Pass