A shot of Halo 4's script in the latest trailer for the game has been deciphered, revealing a number of story spoilers about the upcoming game.

Didact: "Compassion for mankind is misplaced."

Chief: "I'm not doing this for mankind." Chief then charges at Didact.

Cortana rushes towards Didact and jumps all over him (legs, arms, chest, back).

Several takes of "Cortana" tackling and climbing on random objects at full speed.

Didact is attacked by Cortana. He attempts to swat at Cortana as a means of self defence.

Didact unclenches his fist and drops Chief.

"Don't you see it? Requiem. That's where the Didact was hidden. That's where they say he waits."

"He tried to fight the flood. He tried to destroy the humans."

"Didact sleeps and must never be woken."

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The blurry shot was analysed by NeoGaf , and offers insight into what awaits players of Halo 4, as well as those who were planning on reading the tie-in novel The Thursday War.Before we start exploring the spoilers, it's worth noting that these are almost completely guaranteed to be accurate. Aside from the shots in the video, Amazon's listing for The Thursday War allows potential purchasers to look inside the book at some of the pages. As well as corroborating what the script suggests, it also offers a whole heap on additional info on Halo 4's plot. Oops.The game will supposedly start with Master Chief awakening aboard the Forward Unto Dawn as it's being boarded by a bunch of Covenant, who are looking for something other than the Chief. This is apparently an ancient Forerunner weapons cache, as well as details about where they can find an ancient Forerunner called Didact, whom they believe to be a living god.While Didact will be the game's Big Bad, Halo Reach's Dr. Halsey will also appear to aid Cortana, who is deteriorating and now has the ability to project multiple versions of herself.The game is also set to feature a climactic battle between the Chief, Didact and Cortana, details of which are fleshed out in the script:Though that's all we've gleaned so far, more details about Didact and his role can be found in the pages viewable from The Thursday War. These include:There's been no word from 343 Industries on the leak as yet. You can check out the offending screenshot in the trailer below at around the 3.55 mark.Halo 4 will release on Xbox 360 on November 6.

Luke Karmali is IGN's UK Editorial Assistant. You too can revel in mediocrity by following him on IGN and on Twitter