Metroid Prime 2 Demo

The Metroid Prime 2 Demo is a demo disc that was released to the public a few months before the release of Metroid Prime 2: Echoes through a bundle with the original Metroid Prime, as well as via Nintendo Power. It contains a slightly modified version of the E3 2004 demo (with some rooms that were playable at E3 being blocked off, although they're still on the disc). There are a fair few differences from the final game, including a lot of cut content that didn't make it onto the final disc.