How Much of a Halo Nerd are You?

Not as much as me, biotch.

1 What is a Halo?
2 How many Halo games were there? (Not counting Halo 2 Multiplayer Map Pack or any bundle pack)
3 Who says: "Boo."
4 What are the 'Forerunners'?
5 THIS IS HERACY!
6 Unggoy, Sanghelli, Lekogo and Jiral Hanae.
7 Martin Seropian, Alex O' Donnell, Christopher Butcher, Chris Jones, Jason Barret.