So you want to host a LAN party? Well there's a few thing you'll need. While not a necessity, you'll want high speed Internet so you can play the games over the Internet to increase the size of your server. You'll want to have a good assortment of games, unless you're having the party to play a specific game. If you're doing PC gaming, each computer must have a copy of the game, and a different “serial number” for each game (that means everyone has to buy it, you can't share one copy). You'll also want to have the proper equipment.