>I don't think Bouncer exists anymore so it can't really be the grail game (to me).
Unfortunately I will have to agree although I still like to believe maybe it is out there somewhere not yet found.
At least there have been unexpected successes in the past such as the Stern's Moonwar prototype along with several others. My non-cpu favorite two are Atari Crossfire and Allied Leisure's Zap (to eventually be emulated) because I have only seen the game names on various sites and never saw any cab photos (or parts and pieces for that matter on ebay etc) and also no flyers printed. That is why I never thought they actually existed until first seeing a non-working Zap cab on an ebay listing years earlier and then getting actual paperwork of the two games a few years ago. What did help is the fact neither use any roms (all ttl) so that is one less concern when trying to get games emulated.
At least Crossfire now runs in DICE and Zap will eventually get there.