Best game For the first person shooter on DS!
You are soon sucked in, and end up going all over the cluster, getting new weaponry, and fighting the rival hunters who are all trying to get the Octoliths for themselves.
The game has a long life, probably about 5-10 hours for the main story, depending on the player, and maybe 15-20 hours for you to complete it 100%.
The multiplayer is ace, and you can go online via wifi, or you can have a wireless battle. In multiplayer, you can choose a hunter other than Samus Aran only if you have defeated them in the main part of the game. In wireless you can also add bots, so if you wanted to, you could have a bot battle with just yourself.
All in all, if you are in the market for a good FPS for the DS, and you don't mind a good RPG, go for this game!