Turning off Steam Cloud will prevent Steam syncing your player data to its servers. This is handy if you're on a computer where changing accounts is common, or you need to repair your account data.
- Find Gems of War in your Library, right click on it, and select properties.
- Select the 'Updates' tab.
- Uncheck the box next to 'Enable Steam Cloud Synchronization for Gems of War'
- Steam Cloud is now disabled for Gems of War!