I'm pretty sure that what you have to do is to get to level 50 at which point you get to choose a specialisation, although i am not sure if specific specialisations are unlocked at different stages of levelling.
In Halo 4, you are not actually fighting the real Covenant. Instead, you are fighting a rouge group of the Covenant known as "Storm". This rouge group still believes in the Prophets' teachings. Not all Elites are part of Storm, only the ones that still believe.
There is no HALO 4, but If you're talking about HALO ODST, yes, you can play as a human and make your face visible in Firefight
You must get to the rank Luitenant in a game type or for your rank.
OH dear, try harder.
Halo 4 is called Halo 4.
Halo rights are owned by Bungee. Technically Halo 4 is "Halo ODST"
Yes, there is a Halo 4.
There is multiplayer in halo 4
there is no halo 4 because it is a trilogy. halo 3 was the end of the series.
halo 4 limited edition, comes with a copy of halo 4, a T-shirt and special armor customization.
Masterchief
No, the Arbiter is not in Halo 4.