I <3 Halo:Reach - amazingly fun and best campaign + amazing Soundtrack
I <3 Halo 3:ODST - best soundtrack + Firefight + Coastal Highway and Mombassa Streets, amazingly unique campaign.
I <3 Halo 3 - best multiplayer levels + Forge + best Custom Games + soundtrack
I <3 Halo 2 - amazing huge fun campaign + soundtrack + Fun multiplayer
I <3 Halo: CE - started it all
You are Crimson team. Wile most of the time, you are just doing various Spartan Missions, usually one or two chapter per episode really goes into the story. Anyway, Crimson encountered and found the "Didacts Gift". The gift captured one of the scientist to the an Elite Terrorist group, who is now being forced to teleport the covenant to im not sure.
Then another Spartan, named Thorne touched the gift, and he was teleported to Requiem, and is currently MIA. We are trying to find this lost Spartan, and the scientist, and stop the leader of a Elite terrorist group, called "Jul Mdama", and he has been using the forerunner teleporters to evade the UNSC.
Im actually pretty proud of myself for knowing that.
[Edited on 12.29.2012 11:57 PM PST]