How Much Do You Know Halo?

Halo the video game.

1 What year does Halo take place?
2 Who's the leader of the Covenent?
3 Who's Master Cheif?
4 What vehicles have boost?
5 What's 2+2?
6 Is there Halo 3:ODST?
7 How do you get to stairway of heaven?