Great book. It’s a must read. It’s probably so hard to find because it’s so good.
As for the Didact’s inconsistencies in Halo 4 compared to Cryptum and Primordium…
First off, you are given the Domain Terminals.
Secondly, the in game dialogue provides information on who he is and why he’s like that.
“Mankind spread into the stars with an unexpected, desperate violence. Entire systems fell before the Didact’s Warrior-Servants rose to halt the aggression.”
-Cutscene, Reclaimer, Halo 4
We annihilated entire systems of Forerunners before they could properly mobilize against us.
“When the Didact finally exhausted the humans after a millennia, his sentence was severe.”
-Cutscene, Reclaimer, Halo 4
The imagery provided in the cutscene shows how brutal the fighting was. And that brutal fighting continued for 1,000 years of war as evident by the quote.
“The Forerunners made plans for a final, great journey. But the Didact refused to yield our Mantle of Responsibility. He would save all life in the galaxy… at a cost.”
-Cutscene, Reclaimer, Halo 4
“The Mantle of Responsibility for the galaxy shelters all, human. But only the Forerunners are its masters.”
-Gameplay, Shutdown, Halo 4
With the Flood closing in, the Forerunners prepared the Halo Array and pass on the Mantle. However, the Didact believed Forerunners were the Mantle’s masters and was quite insistent the Halos didn’t need to be fired and he could save everyone.
“Such moral concerns faded from the Didact’s attention. The Flood only assimilated living tissue. The Composer would provide the Didact his solution… and his revenge.”
-Cutscene, Reclaimer, Halo 4
OK, this is a big red flag. Shadow-of-Sundered-Star’s nickname is Didact, a derivative of the word didactic, meaning a strict teacher of morals. If the Didact starts to disregard his morals, I think it’s pretty obvious his mind has been touched by insanity.
Everything above is further supported and elaborated upon in the Terminals which are included in every copy of Halo 4.
The Didact’s relationship with Chief also changes throughout Halo 4.
He originally saw Chief as a tool. A means to an end. He manipulated him to release him. And after that, the Didact has no further use for him, so he discards him.
“The Forerunners… have returned. This tomb… is now yours.”
-Cutscene, Forerunner, Halo 4
When Chief escapes his doom, the Didact is impressed but still doesn’t consider him a threat. In fact, he even tries to persuade Chief with logic to turn back and live out the rest of his life as long as he can.
“Your actions tread between honor and foolishness.”
-Gameplay, Shutdown, Halo 4
“Do you truly believe these theatrics can prevent my departure? Embrace your sad fate and retain your nobility. I am already beyond you.”
-Gameplay, Shutdown, Halo 4
“You will relent, human, or you will perish. All in life is choice. And your day to choose has come.”
-Gameplay, Shutdown, Halo 4
And as the Didact prepares to leave Requiem, he informs Chief that he has a choice to save his life, or foolishly die trying to stop him.
“You impress me, human. Your singular valor will be preserved and studied, once your Composition has been completed.”
-Gameplay, Composer, Halo 4
Despite the warning, Chief continues anyway and pursues the Didact. The Didact reveals he is impressed that he chose to fight against impossible odds, but reveals he will be killed (obviously not knowing the Librarian inoculated him)
“Where reason does not stop you, perhaps force can at least delay you.”
-Gameplay, Midnight, Halo 4
This is a pretty big change, as this is the first time the Didact actually considers Chief a threat, but knowing what Chief went through, he understands that he won’t be able to kill him, so he’ll have to delay him until he fires the Composer. And when he does succeed (which is a first considering no Halo antagonist has ever been successful in their goal.)
And when Chief finally approaches him, the Didact treats him as an equal, something he didn’t do before.
Video Context
Notice the fact that the Didact waits until Chief is fully turned around before he attacks him. A sign of equality and fairness.
That’s all in the game.