Summary:
- The original Halo 2 demo from E3 2003 has been leaked online, more than 20 years after it was first shown.
- The leaked demo includes a lot of cut content and features that didn't make it into the final game, such as different weapons, enemy types, and gameplay mechanics.
- This is a significant find for Halo fans, as it provides a rare glimpse into the development process of one of the most iconic video game franchises.