If none of the above work, your Steam installation might be compromised. You can reinstall Steam without deleting your games by moving the steamapps folder to a different location before uninstalling, then moving it back after the fresh installation.

Here is a comprehensive guide to the most effective fixes to get you back into the jungle. 1. Restart Steam with Administrator Privileges

Right-click on and select Properties . Go to the Installed Files tab. Click Verify integrity of game files .

Sometimes, Windows tries to run the game in a compatibility mode (like Windows 7 or 8) that clashes with the Steam API.

How to Fix "Shadow of the Tomb Raider Failed to Initialize Steam"

Corrupted or missing game files are a primary cause of initialization errors. Steam has a built-in tool to repair these. Open your .