It is common for today's computers and operating systems to not run these old DOS games well. Our computers may run them too fast or not at all. If this applies to you, what you need to use to run the games is a DOS emulator. The most popular one of these is DOSBox. I recommend using D-Fend along with it as it is more convenient. Check the applications page for more information and where to download the two programs.
This should help you run the games in all operating systems normally. Sometimes you need to mess with the settings in DOSBox to play the game well but I will mention that on the game page if I need do it.
If something still doesn't work for you feel free to email me at admin[at]80sdos.com. You can also email me to request games, ask me any questions or offer suggestions.