[url=http://www.youtube.com/watch?v=t9EjglYJrtcI]50 "Secret" Unused Gametypes and Medals[/url] that were found in the game.
Some of these include infection, race, juggernaut, and assault.
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Halo 4 is over for all I can see of it. Can't even grind in Spartan Ops without coming to tears over lag or boredom. Good luck Halo 5.