Follow the steps:
1. Download your favorite DOS game from site like DOSGamesArchive (Link for Dave is this)
2. Extract its contents in D: drive or any other drive you like
3. Download the program DOSBOX from here and install it
4. Run DOSBOX and a console windows will pop up. Write the lines as written in following steps:
(i) Mount C D:
Here C is any virtual drive you’re supposing. You can choose any letter of your choice. D is the drive in which the executable file is extracted
This will provide access to the virtual drive which contains the actual files you have in D Drive
This command will launch the dave.exe executable. Please ensure that the file extracted in D drive has the same name i.e Dave.
5. You’re Done!
Similarly, you can run other DOS games also. If you still have some problem, you can mention it in comments 🙂