The audio logs also have many references to Dante’s Inferno
There are nine Circles of audio logs, correlating with the nine circles of hell in the poem.
Circle 1: Limbo: This is the start of the story. Everyone around Sadie feels safe on Earth until the Covenant come, then they realize they are in hell (which Sadie states).
Circle 2: Lust: Kinsler is overcome with lust, even though the world is about to be destroyed around him.
Circle 3: Gluttony: This circle contains Jonas, who is a very large butcher handing out food.
Circle 4: Avarice: This circle is centered around the casino district, where many people are looting the casinos.
Circle 5: Wrath and Sloth: Sadie and Mike attempt to cross the bridge back towards the ONI building, only to be stopped by Kinsler (fallen angel guarding the gates.) An Olifant sent by Vergil (heaven sent an angel) lets them pass safely.
Circle 6: Heresy: This circle is centered around Vergil the Huragok, who goes against the Covenant’s faith and helps the humans. This is also where Tom the salesman reveals Sadie’s position.
Circle 7: Violence: This circle is centered around a deranged officer who kills people inside a police station. He is eventually killed by a SWAT team.
Circle 8: Fraud: There are numerous fraud allusions, including Sadie faking she has a gun to have Vergil turned back on, and the Public Service Announcer who lies to give hope.
Circle 9: Treason: Kinsler returns for the third time, tricking Sadie in joining him by threatening her father. Even though she agrees to go with him, Kinsler kills her father. This also shows the killing of civilians by the police, who swore to protect them.