When modification or abnormality occurs in the various essential files necessary to run a game through Steam, you can restore them to the clean state as it was in the initial installation by using the integrity verification Steam provided.

[Steam integrity verification]

1. Select the game you want to run the integrity verification in the Steam 'Library' (e.g. BLACK STIGMA)

2. Select BLACK STIGMA (Demo), right-click, and select 'Properties'

3. Select 'Installed Files' from the left side of the properties menu.

4. Click the 'Verify Integrity Of Game Files' to run.