NightCoop guide

No join code

Last checked: 2026-11-04 · Official version: v0.2.0-beta (2026-11-02) · Protocol 164 · Free · Windows 10/11 64-bit · Up to 8 players · RED4ext only (no CET) · Phantom Liberty not required

The official sequence starts with Co-op → Host a session. In the lobby, select a world save or New game and complete the Ready step, then use Copy the invite. A missing session code and a missing Co-op menu item require different checks. The menu item is needed before any lobby or invite can exist.

Host checklist before anyone is invited

1. The main menu shows Co-op. If it does not, the plugin file is not where the loader looks. Fix the install before hunting for a code.
2. Every person is on the same NightCoop build and on a game version that build lists, 2.5 or 2.31 for the current archives.
3. The RED4ext log shows the plugin. The logs page has the folder.
4. The host opens Co-op, hosts a session, and copies the invite. A guest cannot invent the code.

Guest side

A guest joins with the copied line. They do not generate one. If the host and the guest are on different protocols, the download page says they cannot share a session. Protocol 164 is v0.2.0-beta. Protocol 143 is v0.1.2-beta. The two October builds share protocol 128 with each other and with nobody newer. A guest who updated alone must return to the same protocol as the host.

The open-beta page describes the first session as host world, your own V, and an invite. It does not mention a store overlay as a blocker. Start with the documented lobby and loader checks. Evidence: 1 source (NightCoop project). Treat this as the documented lobby sequence rather than a confirmed explanation of every missing-code report.