(2013) is a classic example of a communication breakdown between a game and its digital rights management (DRM). While it often pops up for legitimate Steam users during updates or server hiccups, it is also a well-known hurdle in the world of game modding and archival. Why Does This Happen?
The "Steam must be running to play this game" error in Tomb Raider Tomb raider 2013 steam must be running to play this game
– Antivirus software, firewalls, or overlay applications (Discord, NVIDIA GeForce Experience) can block Steam’s API hooks. (2013) is a classic example of a communication
This can happen for several reasons: