If you're missing graphically effects in-game, such as rain, water, fire or the outlines on buildings when using an ATI video card. You can resolve this problem by switching off AA within the Catalyst Control Panel.
More information is available here: http://www.neoseeker.com/Articles/Ha...feature/4.html
If you experience odd problems after updating, or the message 'This game is currently unavailable message on Steam' is shown.
Please verify your Steam cache files. Problems such as: Odd characters in the menu. Buildings cannot be placed in-game. Language speech is missing or anything you had in the game before but don't after updating the game.
To verify your Steam cache files:
1. Open Steam > Library
2. Right click on Stronghold 3 and select Properties
3. Select the Local Files tab and then click Verify Integrity of Game Cache
Also refer to the following for more information: https://support.steampowered.com/kb_...4595-wexn-6831.