Mortal Shell's first content update just so happens to be a Halloween update called Rotten Autumn.
After downloading the update, speak with Gorf to unlock a new mini-quest. Completing it earns you new shades to deck out your Shell with. And you can show the world just how you spruced up your Shell with Mortal Shell's brand-new photo mode.
There's also a separate download alongside Rotten Autumn that adds a new soundtrack for boss fights, courtesy of Rotting Christ.
Those who haven't jumped into Mortal Shell yet can do so with a limited-time 20% discount for the digital version on PS4 and PC. That same discount isn't live for Xbox players yet, but it will be come October 27.
Mortal Shell's physical version releases November 3 on PlayStation 4 and Xbox One in the U.S., then on October 23 for PlayStation 4 and PC (case containing a key) in Europe and October 30 for Xbox One in Europe.