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DevblogNo.003

State of the Net: everything built so far

A technical recap of everything OPEN//77 has built: multiplayer replication, dedicated servers, the Warden panel, Lua scripting, accounts and the launcher.

3 min readOPEN//77 team
In this article

This is the first post of the OPEN//77 devblog. From today on, a post lands here every working day, summarizing what actually shipped in our Cyberpunk 2077 multiplayer mod β€” written for players and server owners, with a bit more technical depth than the daily Discord summaries. Since it's day one, here is the big picture of what already exists.

The game is real multiplayer

OPEN//77 puts other players in your Night City. The core of the project is a native client module and a dedicated server speaking a custom replication protocol, and by now that protocol carries most of what makes a session feel shared:

  • Players β€” movement, animation and emotes replicate between clients, so other players look like players, not sliding mannequins.
  • Combat β€” gunfights, melee and even grenade flight are synchronized, including combat audio. PvP has been through live regression testing between real clients.
  • Vehicles β€” full vehicle replication: drivers and passengers, authoritative vehicle damage, and owner-state sequencing so two clients never fight over who controls a car.
  • The world β€” time of day, weather and world destruction replicate. Destroyed props stay destroyed for everyone in the session, elevators and moving platforms stay in sync, and the single-player population is sanitized out of the way so the server decides who lives in the world.

All of that runs on dedicated servers β€” sessions are hosted, not peer-to-peer, and the server is authoritative over the world.

A platform, not just a mod

Around the game sits a full online platform:

  • Accounts β€” you sign in with an OPEN//77 account. E-mail verification and password reset work end to end, backed by the master server that also keeps the server directory.
  • The launcher β€” a native desktop launcher handles browser-based sign-in, verifies your game installation, keeps the mod up to date through signed auto-updates, and updates itself the same way. One click on a server takes you from the launcher straight into that world.
  • Direct connect β€” open77:// deep links boot the game directly into a chosen server, from the website, Discord, or anywhere a link can live.
  • Server browser β€” a live server list exists both in-game and on this site, with per-server detail pages, icons and banners.

Server owners get first-class tools

Running a world is meant to be a product experience, not a folder of config files:

  • Dedicated servers for Windows and Linux, shipped as versioned builds with a first-run setup wizard that walks through licensing and configuration.
  • Warden, the web admin panel: a config editor with validation, live Lua resource uploads that hot-reload without a restart, announcements, scheduled restarts, multi-user access with custom roles, and a full audit trail.
  • Lua scripting β€” servers are scriptable in Lua against a documented API (browse it under /docs/api), with MySQL bindings for persistence and a freeroam gamemode shipped as a reference resource β€” the same foundation a co-op world or a Cyberpunk 2077 RP server builds on.
  • Moderation β€” server-issued bans and platform-level enforcement are wired end to end, from the in-game action to the master server's records.

Security, in broad strokes

A serious slice of recent work went into keeping the network fair: signed builds with server-side verification, client integrity checks, and platform-level enforcement against tampered installations. We deliberately don't blog implementation details here β€” but the goal is simple: when the doors open, playing legit should be the only practical way to play.

What's next

This entry records an early development milestone. For current downloads and access, read the Alpha guide. Follow the daily posts here, or join the Discord where updates also appear as short summaries.

About OPEN//77

OPEN//77 is a free, in-development multiplayer mod for Cyberpunk 2077: play online with other players in Night City on community-hosted dedicated servers, with synced combat, vehicles and world state, an account-backed launcher, and Lua-scriptable servers for co-op, freeroam and RP. Browse servers, read the docs to host your own, or join the Discord to follow development. This devblog is published daily, straight from the work the team shipped that day.