yes he is the main character in halo 2 & 3
The Halo games are about the Master Chief. Of course he's in all of them (Halo 1, 2, and 3), just not in Halo 3: Orbital Drop Shock Troopers, or Halo Wars.
He's in: Halo: Combat Evolved (considered as Halo 1) Halo 2 Halo 3 Halo: Reach And there will be another in 2012. In between Halloween and Christmas 2012, Halo 4 is coming out and there is proof Master Chief is in it.
in halo: combat evolved, Halo 2 and Halo 3 master chief is the main protagonist and, except in halo 2 where you also play as the arbiter, is the only playable character throughout the campaign. However in Halo 3: ODST you do not play as master chief instead you play as "the rookie" an ODST trooper and you play as the rest of his team. Also in Halo Reach you do not play master chief, but you play another spartan. Halo Reach is a prequel to the series
No
yes combat evolved anniversery.
Master chief and arbiter
Master Chief and the Arbiter
Arbiter joins master chief in halo 3 to fight the flood
If you count Halo 3: Recon, but you don't play as the master chief on that.
Master Chief is the only playable character in Halo 3.
Steve Downes has: Played Gunnar in "Septerra Core: Legacy of the Creator" in 1999. Played The Master Chief in "Halo" in 2001. Played Master Chief in "Halo 2" in 2004. Played Master Chief in "Halo 3" in 2007. Played Master Chief in "Halo: Reach" in 2010. Played Master Chief in "Halo 4" in 2012. Played himself in "Con Artists" in 2013.
master chief crashes on earth at the begining. both of them along with the arbiter crash on halo at the last level