LAN multiplayer game, use Hamachi, Evolve, etc.
UPDATE: Many of you have already discovered this, we were a little late to the party, but Hamachi, Evolve, and many other services, are great, free tools to "fake" a local network and connect with a friend no matter where they are.
Download Hamachi for free to play the game at https://www.vpn.net/
Download Evolve for free to play the game at https://www.evolvehq.com/welcome
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To find a game, you must have someone create a game on the same network connection that your computer is on. If you and another player are not on the same network connection and you try to "Find a Game," the screen will tell you there are no servers available.
Again, download Hamachi for free to play the game at https://www.vpn.net/
Again, download Evolve for free to play the game at https://www.evolvehq.com/welcome