I like this series too much (damn you, nostalgia!), and I would buy it again if the versions on GOG solve the "window frame problem". The Steam versions of some of the games in the series play with a window border visible even in fullscreen, which border hides some of the interface elements. Seeing as on GOG.com classic/legacy games are optimized to run on the newer OSs, is Delta Force fixed bow? Or is the window frame still present? Because if it is, there's not much sense in buying the series again.

Yes.

Yeah! The GOG Delta1 version is even better than the original from NovaLogic site !!

That's cool to know. How about the display resolution and scaling? I see DF has a widescreen mode (via a shortcut key). Does GOG versions of the games go for more than 1024*768 or full-screen 10:9?

I don't see this. Nope. It's still max 1024*768 by moding the config file.

Pressing F12 on my keyboard does this. Noteh that it doesn't rescale to take the full screen, it just cuts from the to and bottom. Helps with seeing the info at the top, which was partly covered by the window border.

It still appears for me. Had to download the Borderless Gaming program to get rid of it.