Kernel Hearts Demo
Play the Kernel Hearts demo and beta playtest - co-op support, sign-up steps, and what the demo covers before the full launch.
What is the Demo?
The Kernel Hearts demo is a free slice of the tower-climbing roguelike action RPG, supporting four-player co-op so you can experience the M.A.H.O.U Unit with friends before launch.
Why play the demo?
Learn the core loop
The demo teaches attack combos, spells, transformation timing, and the climb-reset rhythm that defines every run.
Test four-player co-op
Bring up to three friends into the demo to see how party synergy and combined attacks actually feel in combat.
Join the beta playtest
Beta sign-ups open ahead of major updates - registered players get early access to new floors, chips, and balance changes.
Featured & Essential
Kernel Hearts playtest: Demo Guide, Features & Tips
Prepare for the Kernel Hearts playtest with a practical demo guide covering co-op combat, roguelike progression, builds, and system requirements.
Kernel Hearts demo: Features, Co-op, and Setup Guide
Explore the Kernel Hearts demo, including its action RPG systems, roguelike runs, co-op features, unit customization, languages, and PC support.
All Demo Guides
Kernel Hearts beta sign up: 2026 Step-by-Step Guide
Find the latest Kernel Hearts beta sign up details, demo access steps, Steam wishlist guidance, and official release information for 2026.
Kernel Hearts demo co op: Setup Guide & Co-op Tips
Learn how Kernel Hearts demo co-op works, what to prepare, and how to coordinate combat, builds, bosses, and progression.