YMMV / The Forerunner Saga

• Fan-Disliked Explanation: One should exercise caution when mentioning Greg Bear’s Forerunner Saga novels among Bungie fans, as it contains several notions that have created much controversy.
  • The origins of the Flood as a Precursor bioweapon created from their mummified remains in revenge for the Forerunner’s genocide has been criticised for being absurdly convoluted and making the Flood much less terrifying by stripping them of their mystery.
  • Prehistoric humans being an intergalactic superpower that challenged the Forerunners and Flood has come under fire. And for good reason. It comes out of nowhere and overrides Bungie’s vision that mankind is the Forerunners’ descendants, not their successors, on top of raising hundreds of questions.
  • Many have shunned the trilogy’s portrayal of the Forerunners as a corrupt, hypocritical and oppressive species who would annihilate or devolve anyone who opposed them for contradicting Bungie’s earlier vision of them being benevolent and ethical and serving as a source of Too Bleak, Stopped Caring thanks to a Foregone Conclusion.
• It Was His Sled:
  • Ancient Humanity and the San'Shyuum once had expansive interstellar empires that rivalled the Forerunners in power.
  • 343 Guilty Spark was once a Hamanune human that got transformed into a Forerunner Monitor and survived the events of Halo 3.
  • There are two Didacts.
  • The Flood are Precursors that transmuted themselves into a powdery bioweapon to wipe out the Forerunners in revenge.
• Moral Event Horizon: The Master Builder crosses it when he uses a Halo to punish the San 'Shyuum for rebelling. Even his closest allies thought he crossed it.
• They Wasted a Perfectly Good Plot: A common criticism of the first two books is that they focus on mostly insignificant events while the genuinely interesting parts are reduced to either exposition dumps or a Offscreen Moment of Awesome.