As far as I know the Epson QX-10 / QX-16 is the only home computer system to have never had a game written for it. I've always intended to rectify that situation, since a QX-10 was my first computer, but my current QX-16 system didn't come with a monitor. It uses a nonstandard 40 Hz refresh rate so video capture probably wouldn't work, either (though I've never tried).