By the power of truth, I, while living, have conquered the universe.
Posted by: SubtleSpartan
Just like ODST adds no story to halo 2/3. Doesn't make it bad.
Er... ODST does add backstory to Halo 2 and 3 because it bridges the gap between them from Earth's perspective. The Audio Logs tell how the Portal was discovered, that's a pretty major thing because in Halo 3 it's just there and we're made to just accept that without explanation beyond the additional fiction.