CyberMP Multiplayer Mod for Cyberpunk 2077: Latest Trailer, Stress Test Hits 66 Players, and How It Fills CDPR's Cancelled Plans

Second Semi-Open Stress Test Results

The stress test was held over two days with testers selected from applications . Here are the key technical outcomes:

• Peak concurrent players: 66 players on a single server—a new record for the project .
• Stable comfort threshold: The server ran stably with 30–40 concurrent players .
• Instability above threshold: As player counts climbed above 40 and toward the 66 peak, the server became noticeably less stable .
• Bugs identified and root causes found: The team reported identifying "many small bugs and errors" during the test. Crucially, the stress test allowed them to determine the root causes of errors that occur under high load .
• Prior bug fixes: Earlier closed beta tests (late 2025–early 2026) had already fixed roughly 200 technical bugs, stabilized character appearance sync, added a new chat system, and improved vehicle combat, passenger shooting, and multiplayer racing . The second semi-open test builds on this foundation.

The CyberMP team has said they will use these findings to improve stability ahead of the next open test .

Overall Goal of the Mod

CyberMP's stated goal is to turn Cyberpunk 2077 into a full-fledged multiplayer experience—a free online modification that lets players explore Night City together, engage in co-op activities, PvP, vehicle combat, role-playing sandbox elements, and custom game modes . The team envisions it not merely as a co-op hack but as a persistent multiplayer layer comparable to what GTA Online provides for Grand Theft Auto . It is important to note that CyberMP is a multiplayer mod, not a co-op campaign mod—it does not allow players to play the main story together .

How It Fills the Gap Left by CD Projekt RED

CD Projekt RED had initially planned an official standalone multiplayer title for Cyberpunk 2077, but formally cancelled those plans in early 2021, citing a refocus on single-player experiences and the transition from REDengine to Unreal Engine for future projects . The company never released any form of official online multiplayer for the game.

CyberMP fills this void entirely through community effort. By enabling players to roam Night City together, synchronize vehicles and combat, share the world in real-time, and engage in player-driven roleplay, it delivers the core experience that CDPR abandoned—without requiring any official server infrastructure or publisher support . The mod team has effectively reverse-engineered networking into a game that was never designed for it, making CyberMP the only viable way to play Cyberpunk 2077 with other people.

What's Next for CyberMP?

The team has not announced a release date for a public beta. However, the closed testing cadence—including the latest successful closed beta that the team described as exceeding expectations—suggests steady progress . The next major milestone will likely be an open beta test, which the team has signaled is a priority after the second semi-open test's results are fully addressed .