What is rarest game you have played?

[Scoobes]

Hynad said:

Thrill Kill, on a modded PSOne. The game never saw release, but was still possible to get on certain internet websites for a while.  You can't really go much rarer than that.

If I must mention a game that was actually truly released, then it's Tobal 2, on that same modded PSOne. xD

I remember that! I also had a modded PSone and one of my mate's had a copy he'd downloaded. Weird and insane game. I think I remember a cannibal whose finishing move was to eat their opponent...