Can you do multiplayer on PSP

Yes you can but you may want to check the back of the game case first to see if the game allows multiplayer. In order to play online you must go to your WiFi setting or Wireless Fidelity settings and put in the data it requires (i.p. address, WEP Key, etc.) You than will choose if you want to search locally or globally. If you choose locally, it will search for other players with a PSP and the same game in a given radius around you, preferably with the same connection. If you choose globally however, it will search "globally" for other players. So to simply answer you're question, Yes you can "play" Multiplayer on the Sony PSP.