In my dream, someone on these boards had unearthed a near-complete beta of an unreleased 3DO game called Ninjakoshi. Yeah, Ninjakoshi, as in "Ninja Koshi" - get it? I don't either.

Anyway, I burned myself a copy of Ninjakoshi (seriously, why the heck does my subconscious come up with a name like that?) and played it for a while before I woke up. It was a 3D open world type game, with polygonal graphics which, surprisingly enough, fit in realistically with the 3DO's limitations. Try picturing Alone in the Dark or Immercenary; Ninjakoshi's polygons were slightly less detailed than that. You play a ninja and the gameplay is your basic action/platforming deal, but with lots of non-linear exploration. I remember that though I wasn't totally enthralled with Ninjakoshi, I was impressed at how innovative it was for its time.
If anyone wants to know, "Koshi" is pronounced "KOH - shee". Yes. I heard the game's name pronounced in my dream.