This secret is potentially dangerous and is provided for informational purposes only. In other words, don't do this at home. Some eager gaming hackers out there wanted to get more out of the Xbox, so they developed mod chips. Here are a few of the things they promise to let one do on one's Xbox:

• Play copied and imported games that an unmodified Xbox won't allow.
• Upload games into the system and save them locally on your hard drive.
• Replace your Xbox hard drive with a bigger one.
• Turn your Xbox into a PC and even write your own programs for it.
• Turn your Xbox into a versatile media player, with support for DVDs, VCDs, MP3s, and more.
• Emulate other game consoles, such as Game Boy Advance, Game Boy, NES, SNES, Atari, Genesis, and so on.

Installing one of these chips would void your warranty and is potentially illegal under the DMCA. Mod chips cost up to $75.