3D0 by far, awesome specifications for its time. Sadly there was a severe lack of games production muscle from the makers and supporting companies.
Or the Amiga CD32, the first 32bit CD based games console which also plays CDTV discs, could handle VideoCD and could be build into a full computer with keyboard/mouse/harddrive/diskdrive/internet access/etc.
It sold great initially in Europe (software easily outselling PC CDROM, MegaCD and CDi combined for the UK) until the parent company died. One of big factor why the company died (or rather the final nail in their coffin) was the huge stock they build for the US launch, which they weren't able to sell (blocked by US court) due to patent issues.