[Mobhack]

You get that result when you try to open the game in a fixed resolution that your monitor cannot handle. The game options programme does not matter - it is a windows desktop programme. The game is launched by it, and the game is a DirectX programme, and if you tell it it is in full screen mode, it will try to use the entire monitor like in games of days of yore, because SP is a game of days of yore - just updated to actually play nice with windows if you play in windowed mode. Not full screen!

Full-screen mode remains but is unsupported, we don’t care if it works on whatever hardware you happen to have. If it does so, good for you - but the next say video driver update you get may nuke that.

Full-screen mode is only there for the odd end user who nay be using some version of video driver and monitor combo that allows the old 4:3 pixel ratios in full-screen modes.

Windowed mode is the supported mode for the game. So if you have the free demo version, then you are stuck to a 800x600 mode window. (I don’t think anyone is masochistic enough to try 640x480, even if that was the game's original dimensions way back when!).

Windowed mode is there to be used in Desktop Resolution, where it takes full advantage of your modern widescreen monitor. That mode is the main selling point for the paid version of the game.