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Is RimWorld multiplayer? Yes — with RimWorld Multiplayer

Not out of the box — but the RimWorld Multiplayer mod makes it co-op. RimWorld is a builder & management game released in 2018, 98% positive on Steam (210,517 reviews), with 19,211 playing right now. $34.99 on Steam.

Co-opSingle-player tooMultiplayer via mod: RimWorld MultiplayerStrategy · Builder & management

How to play RimWorld with a friend: RimWorld Multiplayer

Run a colony together; supports most popular mods. Steam lists RimWorld 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.

Get RimWorld Multiplayer

A sci-fi colony sim driven by an intelligent AI storyteller. Generates stories by simulating psychology, ecology, gunplay, melee combat, climate, biomes,…

Steam tags: Colony Sim, Base-Building, Survival, Strategy, Sandbox, Management, Building, Simulation

Do you and a friend both own RimWorld?

Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether RimWorld is one of them — then helps you pick tonight's game with a weighted roll or a bracket.

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Dungeons 3
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The Settlers: New Allies
Builder & management · 47% positive on Steam (911 reviews) · 72 playing right now

Tired of RimWorld? The Swap tab finds the closest unowned games of the same type that are newer or rated higher.

Quick answers

Is RimWorld co-op?
Not natively. RimWorld ships single-player; the community mod RimWorld Multiplayer adds co-op — Run a colony together; supports most popular mods.
Does RimWorld have PvP?
Only with the RimWorld Multiplayer mod, which is co-op only.
How many people play RimWorld?
About 19,211 players were in-game when this page was built (2026-09-08).

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; updated 2026-09-08. Powered by Steam — not affiliated with or endorsed by Valve Corporation.