1. Halo 3
2. Reach
3. Halo 2
4. ODST
5. halo four
Campaigns are irrelevant, sort them in order of the quality of their multiplayer.
I can't remember that much of combat evolved multiplayer, so I can't really rank it with any certainty. I actually enjoyed Reach's matchmaking slightly more than H3's, but I have too many fond memories of H3 custom games to rank it anything other than first.
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God Tier: Halo 2, Halo 3 Great Tier: Halo 3: ODST Good Tier: Halo CE, Halo: Reach Okay Tier: ---- Bad Tier: ---- Shit Tier: ---- >Implying it's worth a damn Tier: Halo 4, Wars, all future Halo titles