Single-Player & Online Co-op
Confirmed modes, the dated playtest invitation notice, and session preparation.
Confirmed modes
Steam lists single-player, online co-op, and public lobbies. The sources checked do not specify a maximum party size, cross-play support, private room-code flow, or exact hosting steps.
Playtest access notice
On October 13, the Steam notice said signups had closed after sufficient registrations and that admitted testers could invite up to three friends. This describes testing access, not the final multiplayer limit. Consult the current Steam notice and the developer's Discord link before arranging a session.
Suggested preparation
Use the same available game build, check your audio and connection, and agree who is speaking during calls. Any roles you choose are a coordination preference, not confirmed in-game classes or stat bonuses.
Read co-op coordination notes. Details such as reconnection, saves, and quota scaling still need build-specific verification.