A GameCube Optical Disc.
The GameCube Optical Disc is a Nintendo-developed proprietary optical disc media for the GameCube. It is based on a variation of the 8 cm DVD, or MiniDVD. The optical disc holds 1.5 Gigabytes of information, and a barcode located on the inner ring of the disk surface assists in disc verification, helping to software piracy.
Though the GameCube Optical Disc could hold quite a bit of information for its time, games which used a lot of voice work or FMV frequently needed to be placed on two discs.
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