Decay By Design: We had so much fun making Mutant Mash-Up and all its weird mobs and locations, and we knew we just wanted more.

More mutants, more monsters, more everything! Of course, ‘more’ can mean a lot of things, so we decided to stick to ‘more messed-up mushrooms’ and design a world and story to be populated by all sorts of fungal creations. Even though the whole idea of a mutant is about combining two things that don’t happen naturally, we looked to real-life nature for inspiration. That’s true not just for the mutant monsters, but for our levels and biomes, too! Although the fungal mutation is absolutely not natural or human, the curve and shape it takes on the environment and beasts is logical to what we see on Earth even if the coloring and context is completely, 100% unnatural. That visual disconnect reinforces the wrongness and creepiness of these mutated lifeforms.
Monster Mashes: These boss fights are some of the most epic we’ve shown you so far!

We wanted to wow you right at the start. Every single boss has a dramatic entrance into the arena to really get your blood pumping and keep that energy high throughout the frenetic fight. You’ll see familiar animals like bats and fish squished together with familiar plants like mushrooms and trees, and somehow, the resulting monster is so much uglier and scarier than if we’d just given it more teeth. (We definitely did give at least one monster too many teeth and too many mushrooms growing out of it. You’re welcome, nightmares.)