Halo

halo combat evolved or 1

Period: Sep 11, 2001 to Sep 11, 2002

halo is the first game of the series

Halo 2

Period: Nov 9, 2004 to Jun 26, 2006

Halo 2 is the second halo game in the series

Halo 3

Period: Sep 25, 2007 to Sep 27, 2007

Halo 3 is the third of the halo series.

Halo 3 ODST

Period: Sep 22, 2009 to Sep 24, 2009

Halo 3 ODST is the fourth in halo series

Halo Reach

Period: Sep 24, 2010 to Sep 25, 2010

Halo Reach is the fifth in the halo series