Co-op is an online gamemode, so cheats do not work. Splitscreen is available in online play, but you will still need Xbox Live Gold for each player profile (Guests do work).
Originally Posted by Creech
As a site, we don't support calling it "xbone" as that was a name that was used to refer to the system in a negative light. Since the site exists to support the system, being deliberately negative towards it seems counter productive.
tl;dr - Call it the Xbox One or X1.