A game I play stores its data in one giant archive. The archive is clearly readable by the game; the game somehow decrypts the archive to load the character models and items and every other aspect of the game.
The game is two files and one folder with the game's music. The files are game.dat (700MB) and info.dat (150KB). With a hex editor, I found that info.dat's header is "*ARK_CRV001_DATA". The first few lines of Game.dat are (numbers added by me):
Not too helpful on that front. 7-zip, FreeARC, and WinRAR can't extract it. With a hex editor, I find references within game.dat to, for example, "life/swim/d004.mdl". Am I wrong in assuming this game.dat is an archive with all of the character models, items, in-game script, and so on still intact? I've actually found where all of the text is stored - it's in plain text within game.dat.
The game is for Wii, I doubt the file is encrypted in any way. If the game was for PC, what would you do? Perhaps it could help me anyway.