After your Halo ventures are done on the big screen why not suit up and take it to the real world, well... the best way one can. All you need is a few friends, an oddball skull, some RFID tags and a love for electronics, wiring and soldering and HEX coding ^^.
http://imakeprojects.com/Projects/RFID-skull/
Cheers,
Kensai
http://imakeprojects.com/Projects/RFID-skull/
Cheers,
Kensai