Fourth in the series of Linuxes that run as screeensavers for Microsoft Windows comes Freeduc-Games.
This comes as a pair of screensavers, 'FrGames' which offers network access and is good for home use, and 'FrGames-NoNet' which isolates the unattended computer from the network and so is maybe more suitable in a corporate environment.
Unpack QemuSaver-FreeducGames.zip on a Microsoft Windows system and run its setup program. Then go to the Windows screensaver menu and select the FrGames or FrGames-NoNet entry. Then sit back, wait, and enjoy.
To close down the screensaver, either do a KDE shutdown, or press Ctrl-Alt-Del and bring up the Windows Task Manager to do the job.