CD:
In every Toa Metru canister you buy, you get a Kanoka Club code to use at the Kanoka Club. Enter it in and you get downloadable content about the Toa you got in it's canister. Nothing really much, except in the end, you can get wallpapers, trailers, and stuff.
Stop the Morbuzahk:
You play as Vakama using his disk launcher to fend off the Morbuzahk vines in the foundry. This was never a complete one released.
Maze of Shadows:
You play as all 6 Toa Metru during the story of the same title in the book series. From what I heard, it's probably the best game ever out of all the Bionicle games. It's a turn by turn game where you fight Rahi and get stuff.