Metroid Prime: Federation Force is a cooperative multiplayer action video game for Nintendo 3DS. Announced at E3 on June 16, 2015, it was developed by Next Level Games. The game focuses on a team of Federation Marines, the Federation Force, rather than Samus Aran. The gameplay has more of a focus on action and sports rather than exploration as in past Metroid games. Prior to the game's release, Metroid Prime: Blast Ball was made available on the European and American eShop as a free demo of the game's Blast Ball game mode.