You can’t play these files on original hardware (a real Gamecube won't read an RVZ file). You need an emulator.
Standard GameCube ISOs contain dummy data (empty padding to help disc reading speed) and uncompressed audio/video. Compression tools strip away this filler and repackage the game using efficient codecs. Gamecube Games Highly Compressed
A real Nintendo Gamecube reads discs at a specific physical layer thickness. Even if you decompress an RVZ file back to ISO, you need a specific mini-DVD burner (LG GSA series) and special discs (Mini DVD-R). Most compressed files have had the "scrambled" data order altered, so a real Gamecube will reject them. You can’t play these files on original hardware
When you see the term it generally refers to two different methods of file reduction: Compression tools strip away this filler and repackage
The Nintendo GameCube remains one of the most beloved consoles in gaming history. With its iconic purple chassis, handle-equipped design, and a library of exclusive titles like Super Smash Bros. Melee , The Legend of Zelda: The Wind Waker , and Metroid Prime , it holds a special place in the hearts of retro enthusiasts. However, as we move further into the digital age, the physical limitations of the console—specifically its proprietary mini-DVD format—have led to a surge in interest regarding digital preservation.
Most websites distribute games as .7z archives. This is not playable. You must extract the .rvz or .iso file first. Do not try to load a .7z file directly into an emulator unless the emulator explicitly supports it.
NKit is designed to "revert" Gamecube games to their original, unscrubable state. Highly compressed NKit files are great for archiving but require conversion for some third-party emulators.