COS-MOS

At a glance

COS-MOS is a free multiplayer strategy game that plays in your browser on cos-mos.serv00.net, with touch controls for phones. On Foundplay since November 7, 2026, with 1 play.

Questions

Is COS-MOS free to play?

Yes. COS-MOS is free and plays in your browser on cos-mos.serv00.net. Foundplay links to it but doesn't host it.

Do I need to download COS-MOS?

No. It runs in a browser tab, with nothing to install.

Is COS-MOS safe?

Foundplay checks its link every few hours and gives it a daily safety check (malware blocklists, downloads, crypto miners, parked domains and fake virus warnings), and hides the game at once if that check fails. No check can promise a site is safe: if a game asks you to download something or for a password, leave it.

Can I play COS-MOS on my phone?

Yes. It has touch controls and plays in your phone's browser, with no app.

Is COS-MOS multiplayer?

Yes. You can play it with other people.

What games are like COS-MOS?

Lie Flat Fairy Tale, Pocket Legion and Launderlord, from More like this below. They're free in your browser too.