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The cave keeps getting bigger; so does the pile of reasons to go back down.
Core Keeper is a free sandbox game released under Proprietary commercial game. It runs on Windows, Linux, needs about 831 MB of disk space, and requires no account, payment or trial. On a computer, the fastest route is the PlayBound Launcher. On a phone or tablet, use the official store or site instead.
Choose how to install
Install your purchased copy with the PlayBound Launcher.
Get your own copy from GOG or Steam, then install it with that store's client or installer. Choose the store where you own the game. GOG's online features require GOG Galaxy.
Windows
Return to PlayBound and use Locate if the launcher does not discover the installed executable automatically.
Linux
Install the Linux build for the copy you own. Return to PlayBound after installation; if PlayBound cannot locate it automatically, launch it through the store client.
How to join and navigate multiplayer lobbies and servers in Core Keeper.
Host a Core Keeper world, then share its game ID with friends or use the in-game invite. Online co-op supports up to eight players.
Minimum
Windows 10 64-bit or Ubuntu 20.04+; Core i5-2300 / Ryzen 3 1200, 8 GB RAM on Windows, GTX 460 / Radeon HD 5850. Steam's Linux listing omits a RAM number; no official storage figure is listed.
Recommended
Windows: Core i5-8400 / Ryzen 7 2700X, 8 GB RAM, GTX 1050 Ti / Radeon R9 280X. Linux: Ubuntu 22.04+, same listed CPU/GPU; no RAM or storage number published for Linux.
Core Keeper supports up to eight players in online co-op.
Yes. Core Keeper has dedicated-server support.
Yes. The Steam release lists full controller support.
No. Every player needs a legitimate purchased copy.
Yes. The GOG listing says GOG Galaxy is required for Core Keeper's online features.
Yes. Core Keeper supports up to 8 players. You can have PlayBound start a dedicated server for your group. It also supports co-op play.