Complete The Stanley Parable.

No seriously, we disabled it.

Kill 30 enemies with the Flamethrower.

Kill the Leviathan.

Own every weapon in the game.

Kill 30 enemies with the Ripper.

Kill 30 enemies with the Pulse Rifle.

Kill a Brute.

Complete Chapter 2 on any difficulty setting.

As Groot, imprison 4 enemies with a single use of Strangling Prison.

Kill 666 Demons (excluding Player Demons and Wolves)

Upgrade Health, Armor, or Ammo

Perform 33 Unique Glory Kills in a single save slot