If you encounter strange behavior while playing a game, one of the first things we recommend is to verify that your game install is not corrupt.
If you are playing a game from GOG, you will need to use the GOG Galaxy client to verify your installed files. To do this:
- Find your game in your GOG Galaxy library list and select it.
- Click the "More" menu button that appears next to "Play".
- Hover over "Manage…"
- Click "Verify / Repair"
This should detect and resolve any errors in your installed game files. For more details, please visit GOG's support web site.