Sony's GameDay series on the PlayStation 2 continues with NFL GameDay 2004. Improved online features include updated login, password features, buddy lists, statistics, e-mail messaging, and a lobby -- where users can meet and chat. Up to four players can participate simultaneously online, and users will also be able to download weekly roster updates and real-time weather conditions. Playbooks are updated for the new season, and the updated AI attempts to mimic what a human player would do in every circumstance.