This bundle includes the following:

• The Bad Seed,
• Fatal Falls,
• The Queen and the Sea.

So you will get 8 new levels and 5 new bosses with all their associated enemies, weapons & outfits on top of the original Dead Cells.

About the base game:

Interconnected levels and progressive unlocking of access to the island provide you with a real incentive to explore your surroundings. Add in a degree of evolution for your character and permanent weapon upgrades and you can see where Dead Cells borrows from the long line of MetroidVanias that precede it.

At the end of the day though, its YOUR skills as a player that matter most! Roguelikes are about constantly getting better until what was an insurmountable obstacle becomes a walk in the park. Unforgiving combat wed to the absence of any kind of safety net makes for an adrenalin-pumping ride each and every run and unrivaled replayability.