God money I'll do anything for you...
This is an early demo of Halo 2 for NIИTENDO's Game Boy Advance handheld video game system. It was leaked to me by one Gus Nomeles, who alleges that all of Halo 2 is in this ROM. It seems to have pretty good anti-emulator protection, as it doesn't run at all in No$gba, and it slows down and clicks in VisualBoyAdvance.