If you collect them all in order in one campaign play through (as in on one save, doesn't have to be all at once) you will get an achievement called marathon man
Chat with our AI personalities
there are no terminals in halo reach did you mean halo 3 or anniversary
it goes halo, halo 2, halo 3, halo 3 odst and soon halo reach will be available
Halo 3, Halo wars, Halo 3:ODST and Halo:Reach
1.) Halo: Combat Evolved 2.) Halo: 2 3.) Halo: 3 4.) Halo: 3 ODST 5.) Halo Wars 6.) Halo: Reach 7.) Halo: Combat Evolved Anniversary Edition (Halo: 4 Coming in 2012)
after Halo reach,there is no more In total, there is :Halo 1,Halo 2, Halo 3, Halo ODST, Halo wars and Halo reach