And it's very likely we never know how good the game is, but it will make one heck of a discovery - not that future Google won't spoil the surprise of course :). The creator, Jason Rohrer also seems like an interesting guy and as I was look for more information I noticed it's not the first time I mentioned or read about stuff he did, as he is the creator of Chain World which, on it's own, it's another great story :)
The designer of Passage, The Castle Doctrine and Diamond Trust of London, Jason Rohrer, has developed a game designed to be played by people he'll never know. Rohrer hasn't played it himself, he says, and has buried the game — designed to survive thousands of years — in the Nevada desert, making it likely that no one will ever play it.
Story by the Polygon : Game designer Jason Rohrer designs a game meant to be played 2,000 years from now, hides it in desert