I person I know had a prototype of Halo Combat evolved

I know a guy who due to illigel activity his brother was able to get a developer disc of Halo Combat Evolved. The things he remembers about it are that The Blind wolves where in the game and on the level The Silent Cartographer, the only mapm was blood Gulch, The Fuel rod Gun was in the game but was untextured just being Purple and the flamethrower did no damage. There was also the pillar of autum but it crashed after keys gave you the gun. If anyone knows anything about this Prototype please comment what it might have been as it sounds amazing.