Steam playtest
Kosso Arena
A signup control was found on 2026-10-29 09:13. Admission is decided by the developer.
Participation is not guaranteed — access to a playtest is allocated by the developer and the rules can change. How it works · Voluntary support for the site
Kosso Arena is an arena survivor-like set in the claustrophobic depths of space. Trapped in a tight energy perimeter, pilot an automated combat unit, dodge relentless alien swarms, and forge game-breaking weapon synergies to survive.
What a Steam playtest is
A playtest is a test build of a game that developers offer before release. On Steam you sign up for testing on the game's page. Whether you get access immediately, or the developer invites you first, is decided by the developer and can change.
More games with a playtest
This game is part of the Playtest Atlas overview — 3645 games in the catalogue.