What You're Actually Looking For
Cyberpunk 2077 is a single-player game. It never had multiplayer, and the rumors from 2018 through 2020 about co-op or shared-world features were stripped during development. CD Projekt Red confirmed this publicly, and the final game contains zero built-in multiplayer functionality. If you see a guide claiming otherwise, it's either outdated speculation or misleading clickbait. That said, there are a few things the community has done to get something resembling multiplayer into the game. They aren't official. They involve mods, workarounds, and sometimes third-party servers. None of them are particularly stable.
Cyberpunk 2077 Gameplay Secrets Multiplayer
The term itself doesn't correspond to an actual feature. What people usually mean when they search for it falls into three categories: shared gameplay experiences via mods, unofficial private servers for roleplay or testing, and the original Phantom Liberty expansion which is also strictly single-player. I spent a couple of weeks digging into the mod scene around 2022 because people kept coming to forums asking how to play with friends. Here's what I found after testing the main options. The most prominent attempt at multiplayer was a mod called CP77MP. It was a proof-of-concept built by a small team that used a custom server architecture to sync player positions, interactions, and basic combat between multiple instances of the game running on different machines. It worked at a surface level. You could walk around Night City together, see each other's characters, and trigger scripted events in sequence. It did not support cooperative questing, inventory sharing, or anything beyond visual and positional sync.
The setup required two things: both players needed identical mod configurations and the same version of the game, and one person had to run the host server software on their machine. I ran into a persistent issue where the host's game would desync after about twenty minutes of play. Save files would become corrupted. I found that disabling the physics mod and lowering the render distance on the host machine extended stability to roughly forty-five minutes before another desync. Not great for a full mission run. Another approach involved using the TweakDB editor to share save file states. Some players took turns hosting sessions locally, exporting save data, and loading it on another machine to simulate progress. This is clunky and only works for narrative purposes. It doesn't give you actual concurrent gameplay. The most commonly recommended route is remote play functionality built into Steam and Discord. Both platforms let you stream your screen to a friend who can watch and occasionally take control in supported games. Cyberpunk 2077 doesn't support shared control in this mode, but it does let you play cooperatively in a loose sense. You share a session visually. One person drives, the other watches and comments. It's not what most people mean by multiplayer, but it's the closest thing the game officially supports without mods.
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I also tested the Vortex mod manager with networking-focused mods like NPC Overhaul combined with Open World Co-op attempts. The results were inconsistent. Some NPC behaviors became more dynamic, but two players in the same instance typically caused collision bugs and broken quest flags. I encountered a specific edge case where two players entering the same radio mission caused the audio to loop infinitely and the game to freeze after the mission ended. The workaround was to have one player fast-travel away before the mission triggered on the other player's screen. That cut the co-op experience into something fragile and unreliable. There are also unofficial roleplay communities that run private sessions using modified clients. These exist outside the standard distribution channels and carry risks including account bans from CD Projekt Red if they detect modified executables. I would not recommend this path unless you're comfortable with that exposure. The community itself is small and not well-moderated. If you're looking for an actual multiplayer experience set in the Cyberpunk 2077 universe, your best bet is GTA V mod menus or Fortnite Creative maps