Set in early 20th century Europe, Diplomacy lets players both take command of one of seven nations and use every underhanded, sneaky, unconscionable, backstabbing, diplomatic trick in the book to scheme their ways to continental domination. The game features single-player and online and LAN multiplayer modes, a graphical negotiation language that makes the act of diplomacy the same whether you're dealing with other players or artifical intelligence, an in-depth tutorial, and online ranking ladders, tournaments, and matchmaking services.