I’m going to take a break from discussing open source educational software and take a look at something fun. Some of you may fondly reminesce about games that ran in DOS, such as DOOM or Heretic. The good news is that you can run these games again in DOSBox. DOSBox is an open source DOS emulator that allows you to run your favorite DOS games. All you need are the original game files and you’re ready to go (these can be found online, so you won’t need a time machine). DOSBox is available for Linux, Microsoft Windows and MacOS.