Here is a blog post covering your options for playing this kaiju classic. How to Play Godzilla: Destroy All Monsters Melee Today
Who is your (hardcore fans or casual gamers)? Download Godzilla Destroy All Monsters Melee
Due to complex licensing agreements between (who owns Godzilla) and the original game publishers ( Atari/Infogrames ), the game is currently in "licensing limbo." This is why you won't find it on the PlayStation Store, Xbox Marketplace, or Steam. Which version should you choose? Here is a blog post covering your options
Early Wii models (with the controller ports on top) are fully compatible with GameCube discs. Which version should you choose
The original Xbox version is backward compatible with the 360, though you may need an official hard drive for the emulation software to work. 3. Emulation (PC and Mac)
Features slightly better graphics and an extra character (Kiryu).