Fix: "Steam Must Be Running to Play This Game" in DmC: Devil May Cry
The default DmC launcher (the little window where you adjust resolution) is awful and frequently causes handshake timeouts. You can bypass it entirely.
One of the most frustrating issues PC gamers encounter is a launch failure. For fans of the hack-and-slash classic DMC: Devil May Cry , a common error message halts the experience before it even begins: Fix: "Steam Must Be Running to Play This
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.
: Some players found that older retail keys or specific versions (like the 2013 build) struggle on newer systems. Ensure you have the latest version from the Steam servers, which is better optimized for modern OS environments . For fans of the hack-and-slash classic DMC: Devil
: Completely exit Steam first. Right-click the Steam shortcut on your desktop and select "Run as administrator" . Once Steam is open, try launching the game from your library.
Sometimes, the file that tells Steam "I am DMC: Devil May Cry" goes missing. Steam has a built-in tool to fix this. Ensure you have the latest version from the
: Navigate to your main Steam installation folder (usually C:\Program Files (x86)\Steam ). Find and delete the file named ClientRegistry.blob . Restart Steam; it will automatically update and recreate this file, often clearing the "Steam must be running" loop. Verify Integrity of Game Files : Open your Steam Library . Right-click DmC: Devil May Cry and select Properties .
: Add the game's folder and Steam.exe to your antivirus and firewall exclusion lists, as false positives can block the connection .