DOS Games made for DOS require an emulator to run on Windows. Use DOSBox or a frontend like D-Fend Reloaded and read this guide to play DOS games on your Windows PC.
In addition to the full game, the full retail version also includes shareware versions of Radix: Beyond the Void, Tyrian and Jazz Jackrabbit, of which the game also features secret characters.
The above text is licensed under the GNU Free Documentation License. This text is based on this Wikipedia article.
Search on eBay