If you don't want to play on battle net for Warcraft 3 or you just lost your cd key to go online, you can download Garena. Garena Allows you to play with others as if you were online, but instead you go to local area network instead of battle net. Its like world wide lan. You can gain levels by playing games in Garena. It also isnt limited to just Warcraft 3. You can play a whole bunch of games through Garena like, Counter strike Source, Cs 1.6, Left for dead 1 and 2, Call of duty, ect... I recommended checking it out.