Tdingus is correct, "Metroid Prime: Hunters [First Hunt]", was the demo that came packaged with Many a Nintendo DS back when the system first hit shelves. It is a demo of the full game titled "Metroid Prime: Hunters"
The demo includes three short single-player games, a trailer for the full game, and a small multiplayer section.
The demo is a collection of trials to test Samus's abilities. These include Regulator, Survival, and Morph Ball Training. Points are gained based on performance in these trials, and by combo-ing enemies without missing a shot.