The upcoming demo for Phantasy Star Nova will feature cooperative multiplayer for up to four players over a local Wi-Fi network. The demo will not allow character creation or story progress, but will feature a battle against the Gigantes enemy, Agrios.
Sega has stated the demo will require around 1.15 GB of space to download. I myself cannot wait to reenter the world of giant beam swords and feeding my robot healing items.
The full version of Phantasy Star Nova will be available this November in Japan.