Metroid Prime: Blast Ball
Developer: Next Level Games
Blast Ball very much feels like a game that's still in development. The ball physics feel off, there's not a whole lot of content and it feels half-baked. When viewed as a standalone piece of software it's not exceptional in any way, though it's still worth a shot as a free download. It'll also feature within Federation Force (with the servers switching to that full game in North America), and it seems likely to serve as a shallow diversion that you'll no doubt find yourself coming back to now and then. We'd recommend you pick up Blast Ball in its free incarnation (which is permanent in Europe but not North America) as it's an entertaining mini-game that offers up some mindless fun, but it's not necessarily the best advert for Federation Force.
Nintendo 3DS - Metroid Prime: Federation Force E3 2015 Trailer