Reach, is also another game that is kinda tricky for me to rate. I have so many good memories of Reach, and I think it wasn't too far from being one of the greatest Halo's, objectively.
Halo: Reach, bang-for-buck, as a package, surpasses even Halo 3. Social features, Forge, and player Customization were all massively expanded.
Unfortunately the gameplay is severely inconsistent with accuracy bloom oppressively hindering the weapon sandbox, and Armor Abilities nullifying the design of many maps and the concept of equal starts.