I only feel comfortable to rank the FPS games, haven't planer enough of Wars, Spartan Assault or Spartan Strike.
1. Halo 3: Everything that makes Halo a great experience exists in 3, I love almost every aspect of it.
2. Halo Reach: Only lacks in MP compared to 3, but the Forge, and campaign was stellar.
3. Halo 5: Say what you want about the campaign, it had some of the best moments of any Halo campaign to me. From Exhuberant (butchered) Witness' zoo to rusning down the Guardian and the set pieces were solid. The MP is top tier gameplay!
4. Halo 3 ODST: Best campaign, hands down, I love the noir tone. Best Firefight as well.
5. Halo CE: This is mostly nostalgia for me, it's not that special anymore. But there are so many good memories from it.
6. Halo 2: Solid game, didn't play MP back then so I have no opinion on it.
7. Halo 4: It could have been great but it wasn't. Story was good but the campaign in general was boring and too static. MP had its moments but mostly it was just too different from Halo and too similar to any other FPS.
There, my ranking. It will be considered stupid to some because both of the 343 games weren't at the bottom but screw it :P
