Well, I finally mustered up the patience and beat it on easy.
I can't imagine it on anything harder. Not that easy was difficult (I rarely lost my shields unless a combat form came out at me with a rocket launcher
), but the combat forms of the Flood literally surround you incessantly and I found myself getting meleed a lot by them.
I enjoyed reading the books more though. I felt that the game, while as in-depth as it was, cut a lot off and found itself being very repetitive. At least in the book when the Chief was going through the ten levels of the Flood as he searched for the Index, it just skipped through to the important parts of the mission rather than going through the whole redundant killing...
On a side note: With Halo destroyed, why can't the Flood still live? I mean, the ring only broke apart. It didn't vaporize. I could see a chunk of Halo interacting with another planet and the Flood (who still could live on that broken chunk) could infect the sentient life. I haven't read the
Ghosts of Onyx yet nor played Halo 2 or 3 so...I guess I'll just have to find out!