ScummVM is a program which allows you to run certain classic graphical
adventure and role-playing games, provided you already have their data
files.
The clever part about this: ScummVM just replaces the executables
shipped with the games, allowing you to play them on systems for which
they were never designed!
ScummVM is a complete rewrite of these games' executables and is not an
emulator.

ScummVM supports a huge library of adventures with over 250 games in total.
It supports many classics published by legendary studios like LucasArts,
Sierra On-Line, Revolution Software, Cyan, Inc. and Westwood Studios.
Next to ground-breaking titles like the Monkey Island series, Broken Sword,
Myst, Blade Runner and countless other games you will find some really
obscure adventures and truly hidden gems to explore.