Ok. Just finished the campaign. I have some questions.
How did Cortana/MC know Didact's name? Why weren't they surprised to see him?
How did Didact's stay alive for hundreds of thousands of years? Why did he decide to not leave until now?
Why were the covenant fighting humans still? I thought there was a truce?
Why does Didact's hate humans again? And why did he create prometheans?
I thought there was some bit about copying sentient minds over to machines?
What was that blue shit at the end? Why didn't MC die?
Really dumb for the story to leave me with so many questions....
1) Poor writing. If you really want to stretch it, there's an audio log type thing in the beginning of Level 2 that mentions the word Didact, and the Elite that kneels as the Didact is taking control of his Prometheans after his revival says his name as well.
2) He was in his cryptum (the ball), in a sort of stasis field, if I'm remembering my novel info correctly. He was trapped in there by the Librarian and only a human (Reclaimer) could get him out, which is what Chief inadvertantly did by touching the pillars, thinking it was a comm relay satellite.
4) This branch is a group that does not trust humanity (for good reason, as we incited a civil war to destabilize them after the events of Halo 3), rebelled against the Arbiter on Sanghelios, and discovered that the Didact was somewhere out there and revere him as a god hoping he'll lead them to the destruction of the human parasite. What, you mean the line "These Covenant seem more fanatical than the ones we fought before." didn't tell you that in a satisfactory manner? Who fuckin' knew.
4) Watch the terminals. It's not ideal, but it'll answer your questions. Prometheans were created to combat the Flood because the Flood only consume organic material.
5) That is the purpose of the Composer.
6) Cortana had control of the hard light systems (see: the light bridge) and shielded him. This also gave her the benefit of being "solid" so she could now "touch" the Chief. It's silly. I know.
The story is not handled especially wonderfully.