The Hunt the Truth podcast series is one of my favorite pieces of Halo media. It's legitimately intense, suspenseful, wonderfully character-driven and unexpectedly dark. It paints this really engrossing picture of humanity being, in some cases, it's own sinister enemy, as well as going back into the origin of the Spartans.
I quite like Halo 5 overall, but the podcast was of a certain direction and writing quality that I was expecting the game to match and didn't quite feel it did. I expect that was less because they were aiming to mislead anyone but rather that game dev has it's own realities to face and I expect the creative teams for the podcast and the game were not the same and interested in tackling their own perspective.