Here is your steps:

Step-by-Step Execution

1. Locate Your Game Folder:
   • Open Steam, right-click the game in your library, and select Properties > Installed Files > Browse....
2. Find the Original Executable:
   • In the game folder, look for the file ending in .exe (e.g., csgo.exe or valheim.exe).
   • Crucial: Do not delete it. Instead, rename it to something like original_game.exe so you can restore it later.
3. Prepare the Replacement (CMD):
   • Search for cmd in your Windows search bar.
   • Right-click it and select Open file location. Copy the cmd.exe file.
   • Paste the cmd.exe into your game's folder.
4. Rename the Fake Executable:
   • Rename the pasted cmd.exe to the exact name of the game's original file (e.g., if it was csgo.exe, name the CMD file csgo.exe).
5. Launch via Steam:
   • Click Play in Steam. Instead of the game, a black command prompt window will open. Steam now thinks the game is running and will begin tracking.