KiigelHeart on 13 July 2016
#1 - Halo 2
#2 - Halo 4
#3 - Halo 5
#4 - Halo 3
#5 - Halo: CE
Campaign only and I haven't played Reach. I haven't played much Halo multiplayer but Halo 5 and 4 are the best by a long shot.