Ok... you obviously didnt wanna look around.
The whole "Halo" mod thing was the idea to port the custom Counter-Strike MasterCheif SAS model from the HL engine to MD2 format. of cource it requires a decent amount of modeling experince... animating ect...
Aside from the attempts to port the model there was also a "mocup" of the title screen... really nothing special... a gradiated box with the Halo PC start screen...