X-MAME is the X11 port of the MAME arcade game emulator.

MAME is a virtual machine emulator; it includes emulators for numerous
CPUs, sound and video chips used in arcade games, as well as special
purpose decoding PALs and detailed information about the memory layout of
each game.

To play games in X-MAME you must have a copy of the original ROMs from
the arcade games.
