- docs/ghost-multiplayer.md: the full beta guide - player usage, cvars,
relay deployment (VPS build/install, free-tunnel option, verification),
logging/troubleshooting and security notes.
- tools/ghost_relay.service: hardened systemd unit for the public relay
(Restart=on-failure, NoNewPrivileges, PrivateTmp, ProtectSystem).
- tools/ghost_relay_deploy.sh: one-shot build + install + enable script for
the VPS (GHOST_RELAY_PORT / GHOST_RELAY_VERBOSE overrides; opens the UDP
port via ufw). Verified: the exact build line compiles and runs.
- README: multiplayer pointer under 'How Do I Play?'.
