The game is only 'multiplayer'.
Probably the purest, most true form of mmo I've ever had the pleasure to play (in terms of freedom of action, no hand holding or spoon feeding here).
Every day that passes without running into somebody is another day you live to see the next sunrise, be thankful.
Because one day... You'll look around at your accumulated wealth and assets and realise that not only have you become successful... You've also become a target.
One day you'll get your wish and meet some people and on that day you'll realise the meaning of the phrase "be careful what you wish for".
