Halo 4.
I will also be getting Halo 5 I <3 My Halos. I have Halo 3, ODST, 4. I found out about Halo because one of my friends had Halo 3 and suggested it to me so I saw it at game for about £3.00 about 3 years ago. Picked it up. Loved it, and here we are.