Shutdown

Shutdown is the 6th level in the Halo 4 campaign. It was first announced along with the rest of the achievements for Halo 4. For the first time in any Halo game you can drive a D79H-TC Pelican as part of the campaign or multiplayer. In Halo: Reach this was achieved with an easter egg.

Transcript
Cutscene

Screen fades to Cortana looking at the "sun" Cortana turns around to see Chief loading his weapon. Lasky enters room. Pelican slowly rises behind Chief. Lasky nods his head toward the Pelican. Lasky leaves the room and Cortana looks to Master Chief. {Gameplay} Edges of the HUD start to turn into blue static More coming soon...
 * Cortana: I can give you over forty thousand reasons why I know that sun isn't real. I know because the emitter's Rayleigh effect is disproportionate to its suggested size. I know it because its stellar cycle is more symmetrical than an actual star. But for all that, I'll never actually know if it looks real... If it feels real...
 * Cortana: ...before this is all over, promise me you'll figure out which one of us is the machine.
 * Lasky: So what's your plan?
 * Master Chief: Infinity's tracked the Didact's vessel to a docking structure southeast of here. We'll jump ship as Infinity exits the roof.
 * Lasky: You know, I was sent down here with orders to prevent you from leaving. In case you had already gone, I took the precaution of ordering a Pelican outfitted for full combat pursuit.
 * Lasky: I hope to God you're wrong about that Forerunner or whatever he is, Chief. But in the event you're not...
 * Lasky: ... And Chief? Good luck. Both of you.
 * Cortana: ... C'mon, Chief. Take a girl out for a ride.
 * Cortana: The Didact used this 'Composer' to create the Prometheans from ancient humans.
 * Cortana: If he's to finish the job, he'll have to find it first.

Trivia

 * Through a glitch, one can skip the two towers and head directly to the third tower, drastically cutting the level short. The glitch can be seen heHalo 4 Campaign - Glitching Shutdown on Legendary-0