DOSBox

DOSBox is an emulator that emulates an IBM PC compatible computer running MS-DOS. It can run many MS-DOS games. You can find a list of compatible games here.
DOSBox works wit a command line, but there are some graphical frontends:
AmpShell
DBGL
D-BOX
DOSBoxGui

GOG.com is company that sells many great old DOS games

DOSBox website









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