So I downloaded Duke Nukem 3D today, and playing the game makes my computer's resolution jump all over the place. The first two times I played it, it was fine, but upon exiting, my desktop's resolution shrank from 1680x1050 to 1280x800. The third time starting up the game, the image was no longer at full screen and appeared compressed. After a while I realized that if I turned my computer's resolution down to 1280x800, even though I didn't have to the first couple of times.

Admittedly, I'm not that experienced when it comes to PC gaming, but this is odd to me. When I downloaded Doom off Steam I never had to tinker with the resolution so the game or desktop would fit the screen. Same thing when I played Ultima and Fallout off GOG. Granted, this isn't exactly a deal breaker, but I'm curious as to why this happens.

For extra information, my desktop is Windows 8 (off-topic, but I love GOG because it accommodates Windows 8 users. Wish I had a different desktop so I could play other PC games, not to mention have Doom work again, but oh well). If anyone is tech-savvy enough to tell me why this happens, I'd greatly appreciate it.

DosBox.

Ok, hm. I've never had an issue with DosBox doing that. What are your settings? You might want to give eDuke a try as well.

Are you talking about the screen settings? Because they're at 320x200. There is another option but I have no idea what it means. Guess I'm too much of a noob...

Actually, when I launched the game at the settings screen, it was at full screen. Didn't have to tinker with the resolution or anything, even after quitting out. To make sure, I launched the game from the desktop, and lo and behold it's working just fine.

I literally have no idea what just happened. Was it just malfunctioning or something? Oh whatever, at least it works for now. Thanks anyway.

Huh, that's really odd. Well, at least it's working now. Enjoy!

sounds like the game isn't completely shutting down when you exit

if it does it again open the taskmanager and see if there are still instances of duke3d.exe or dosbox.exe running

I highly recommend using eDuke. You only need the DUKE3D.GRP file from GOG's DosBox version.