I descend into the Ring to find out what the Banished are after.

I finish off Bassus, and Weapon blows up the laser.

I take out the cooling towers, leading to a boss fight with Bassus.

I move forward in the story, and have to shut down a giant laser drill.

I mis-read the name of a Banished repair facility, and then blow it up.

I continue moving forward, taking the next FOB and rescuing some Marines.

I go hunting down log recordings from the Redoubt.

Master Chief clears a Banished prisoner transfer center.

With my grappling hook upgrade, I go after the skull again.

I finish off the Blademaster and move on to a Spartan Core.