There have been loads of consoles released over the years, & most of them failed. I'm wondering what the rarest console people have ever owned is.
Mine is the Philips CD-i. Got it for Christmas '95(?) with about 10 games, including the infamous Hotel Mario & Zelda's Adventure. Later picked up Link: The Faces of Evil, which was marginally better than Zelda's Adventure, which is to say that it was just terrible.
To this day I can't believe I finished Mad Dog McCree using that shitty controller: http://www.old-computers.com/museum/hardware/philips_cdi_ir-controller_1.jpg
Also can't believe I finished games like The 7th Guest & Burn:Cycle without the aid of the internet, (didn't yet have a computer in those days). Burn:Cycle was by far the best game on the system, with a great soundtrack and setting. The Joker's Wild was a decent trivia game. Apart from those, the system was a disaster.