1. The Covenant
2. Jacob Keyes
3. Microsoft, and Bungie
4. The original halo was intended to be an FPS only found on the PC. Todays original Halo PC version is different from the first version of it.
5. The Master Chief (Halo 1,2,3,4 odst), Cortana (Halo 1,2,3,4, Reach. [The package]), Noble Six (Halo Reach, The Rookie (Halo 3 O.D.S.T.),
6. Halo 3 O.D.S.T. was originally called Halo Recon.
7. Halo CE: 2001, Halo 2: 2004 (PC: 2007), Halo 3: 2007, ODST: 2009, Wars: 2009, Reach: 2010, Anniversary: 2011, Halo 4: 2012.
8. Dr. Catherine Elizabeth Halsey
9. The Spartan I's
10. "Wake me, when you need me." Quote taken from Halo 3, Legendary ending.
