Dmc Devil May Cry Steam Must Be Running To Play This Game Fix Top

If you are on the Steam Deck, do not launch the game in Game Mode (the default Big Picture interface). Game Mode sometimes strips background processes to save battery, killing the Steam handshake.

How to do it:

Why this works: The desktop environment keeps the full Steam client (including web helper and overlay) completely awake.

Best for: Users with strict third-party antivirus software (Norton, McAfee, Bitdefender, etc.). If you are on the Steam Deck ,

Antivirus software can mistake the DRM check for malicious data transmission and block it.

This game has a native Linux port, but it is broken. The native version is the primary culprit for the "Steam must be running" error because it uses an outdated Steam API. The solution? Force the Windows version via Proton.

Step-by-step:

The Result: Steam will download a ~4GB Windows version of the game. The Windows version, running through Proton, has a much more robust DRM handshake and bypasses the buggy native Linux client entirely.

Note for Steam Deck users: The game runs at 60 FPS locked on High settings using Proton. You lose nothing and gain stability.

The error is essentially a communication failure between the game executable and the Steam client. Steam acts as a Digital Rights Management (DRM) layer for many games. When you launch DMC: Devil May Cry, it sends a signal to check if you are logged into an account that owns the license. Why this works: The desktop environment keeps the

The error typically occurs due to:

Here are the top fixes, ranked from the easiest to the most advanced.