Metroid Prime 2: Echoes Bonus Disc

The Metroid Prime 2: Echoes Bonus Disc was a preview demo for Metroid Prime 2: Echoes on the Nintendo GameCube. The game contained trailers, an up-to-date history on all of the announced Metroid games, as well as concept art from the Prime series, and a demo featuring a remixed room layout (compared to the final released game). The disc was mailed to those on Nintendo.com who registered enough games (without a case), and was later bundled with Metroid Prime in new packaging. This new set was then bundled with GameCube later on.