What's the most obscure role playing games you've played?
I've got several, but the one I'd pick as the most obscure was published by an Australian guy. The game was Hunter Planet, and the PCs were aliens going on a safari hunting vacation on a newly discovered planet, named Earth. The initial surveys of the planet, just a few hundred years earlier, showed the inhabitants to be at a suitable level of technology for hunting expeditions.
It was a comedic sort of game, since of course the PCs are landing on Earth in the modern day, when the opposition they'll face is far greater than they expect. They've still got alien tech on their sides, so despite being alien businessmen on holiday they still have a decent chance to get back to the ship alive.
Great fun, if fairly limited replay value.