Invite a friend via your Steam Friends list by right-clicking their name and selecting .
The current stable build is Build 41 (which includes v41.77.9), featuring overhauled animations and deep survival mechanics. Project Zomboid Free Download (v41.77.9 Co-op)
It is priced at $19.99 USD on Steam . There is no official free-to-play version. Invite a friend via your Steam Friends list