Before diving into fixes, it helps to understand the why. The "Failed to initialize Steam" error means that the game’s executable (BH6.exe) tried to communicate with the Steam client via an Application Programming Interface (API) called SteamAPI, but the handshake failed.
Common causes include:
Let’s fix this.
Windows often restricts how programs communicate. Steam needs elevated privileges to inject its API into the game process.
How to fix:
If that doesn’t work, also elevate RE6:
Now try launching via Steam again.
If those quick steps don’t work, follow the detailed steps below.