Download the launcher
What is Rim Conquest Online
A multiplayer RimWorld mod where everyone plays on the same planet. You found a colony, grow it like normal RimWorld, and your neighbours are real players.
The current world started on October 18, 2026.
- One shared planetEvery player's colonies sit on one world map. You can see who's near you and what they hold.
- Alliances and pactsTeam up with other players in an alliance, or sign a pact with another side to keep the peace.
- Capture resourcesControl points across the map hold stocks of gold, plasteel, chemfuel, hyperweave, medicine and meals. Capture one and its goods come to your colony. Other players' colonies can be captured too.
- Real-time raidsWhen someone attacks you, it happens live, and you fight it yourself.
- When you log offYour capital freezes and is safe: nothing ages, starves or burns while you're gone. Your other colonies can still be attacked, and your colonists defend them on their own.
How to join
- Download RimConquestOnline.exeSave it anywhere, like your desktop. It's the only file you need.
- Run itIt finds RimWorld through Steam and installs the mod into its own profile. Your normal game, saves and mod list stay as they are.
- Press PlayYou join with your Steam account, no extra sign-up. RimWorld starts and drops you straight into the shared world. Pick a spot on the planet, found your colony, then name your faction.
What you need
- RimWorld 1.6 on Steam
- Royalty, Ideology and Biotech (the launcher checks them for you)
- Steam running and signed in
- Windows 10 or 11
Windows may warn you about the file. The launcher isn't code-signed yet, so SmartScreen calls it unrecognised. Choose More info, then Run anyway.