The Bad Seed DLC

The Mad Seed DLC is the first paid expansion for Dead Cells. It was released on the 11th of February 2020 to PC, Xbox One, PlayStation 4, and the Nintendo Switch, and on the 30th of March 2021 to iOS and Android. The expansion adds a new optional side route through the early section of the game, with new enemies and a new boss to fight, as well as new outfits and gear to unlock.

This list contains all newly added content that is locked behind the DLC, it needs to be installed for this content to be found. This includes additions from later updates.

Contents
The expansion includes a total of three new biomes:
 * Dilapidated Arboretum
 * Morass of the Banished
 * Nest

Five new enemies:
 * Jerkshroom
 * Yeeter
 * Banished
 * Blowgunner
 * Giant Tick

A new boss:
 * Mama Tick

Six new items:

A new key:

14 new outfits:

And eight new achievements:
 * Go play outside!
 * The mud is getting warm, so you might as well swim.
 * Knee deep in mud...
 * I've got my eyes on you...
 * Take that, sucker!
 * Bound for Hell
 * Pact with the devil
 * Who's a good boi?