It's humans Vs. the invading aliens. Players can choose to take the role of either armies and can compete from the arcade or from home, with and against other players in either location. Network games require a 56k modem only, no DSL, ISDN or other high-speed data transfer device is needed.
The game comes complete with its own headset so that players can talk to one another. You can help your teammates or taunt your enemies.
Players can create their own "handle" which can be used in the arcade or from home as a special Alien Front Online web identity. Play the arcade version to unlock special secrets and bonuses in the home version. Chat online with other players, form teams, play in on-line tournaments and compete for special Sega prizes.