Everything! If there’s no tournaments going on that you want to participate in, you’re free to play whatever you want. While MMOs and single player games are technically allowed, the point of a LAN party is to play games with everyone around you! We highly encourage everyone to start local servers and try to get everyone around you playing the same thing. The Discord channel is a great way to find other people that want to play the same game as you. So fire up a UT2K4 server, post an invite in Discord and start fragging!