Is Online: 404 single-player?
Yes. Steam lists single-player and online co-op.
Can you play co-op?
Yes. Online co-op is listed as a current feature. The store page does not promise cross-platform play, so do not assume it until an official announcement says so.
When does Early Access start?
The Steam listing currently shows October 17, 2026. Dates and availability can change; confirm the live listing before planning around it.
How long will Early Access last?
The developer note says the target is six to twelve months for the final version. That is an estimate rather than a fixed commitment.
What content is planned?
The developer describes new locations, survival mechanics, zombie and animal interactions, voice acting, bug fixes, and more phone mini-games.