Sometimes the error is misreported. "Failed to Initialize Steam" can occasionally mean "Failed to Initialize DirectX." The game comes with older redistributables that may conflict with modern Windows environments.

This is a veteran trick. You can force the game to recognize Steam by manually creating an AppId file.

→ Yes? Proceed to Step 5.

The "Failed to Initialize Steam" error in Hitman: Absolution

Aggressive antivirus software or the Windows Defender Firewall can mistakenly flag the game's initialization requests as suspicious network behavior, blocking the game from communicating with Steam.

Many users find that the error is caused by a lack of permissions. Setting both the Steam client and the game executable to run as an administrator often fixes this. Completely close