Here’s a concise fix for the “Steam must be running to play this game” error with DmC: Devil May Cry on Steam:
The results were a chaotic ocean of forum posts from 2013. He skimmed through outdated threads. "Re-install Steam." – Tried it. Waste of time. "Disable your antivirus." – Risky, but he tried it. Nothing. "Delete the appinfo folder." – He navigated through his Program Files, deleting the specified folder, heart pounding. He restarted Steam. It re-downloaded the cache. He clicked play. Here’s a concise fix for the “Steam must
Corrupted local Steam files can prevent the client from communicating correctly with the game. "DMC Devil May Cry" - 8 instances "Steam
Leo read the text carefully. "The game looks for the Steam.exe process in a specific way. If your Steam is set to run in Compatibility Mode for Windows 7 or 8, or if it's set to run as Administrator, the game's DRM (Steam API) fails to 'handshake' with the client. The game thinks Steam is a stranger." DmC problem on modern systems (Solved)
18;write_to_target_document7;default0;a1;0;a1;18;write_to_target_document1b;_qKPsabGkOKuenesPgrCisQ4_100;57; 0;a6a;0;5e9; 0;11c5;0;2638; DmC problem on modern systems (Solved)