It's amazing how this still isn't stickied.....
Iggy did that in LINES, though in a fantasy setting...I just recently played Indiana Jones and the Fate of Atlantis again, an old Lucas Arts adventure. The idea of a ancient era nes with an atlantis either in the med. sea or behind the pillars of heracles would be quite interesting. One could either add some fantasy with orichalcum powered machines of death, or just claim that the Atlanteans are the Sea People.
See my above post.That was stJNES9, I believe. You were Sri Lanka. He put Atlantis in the Azores, IIRC.
A promising - if very difficult to properly execute - idea would be a modern day NES variation... with all (or rather, a few specially-selected ones) of the conspiracy theories true. I mean, a NES with alien technology, supersoldiers, mind control devices, psychotronic warfare, state-employed telepaths, clones (especially Hitler clones) and so forth. The main difficulty here will ofcourse be that of regulation, as if indeed we were to allow all the theories then it would simply be TOO crazy.