Undergrowth

Undergrowth is a region exclusive to the Downpour DLC, with being the only Slugcat that can access it. It is the remains of the Drainage System, now overgrown and a thriving ecosystem. The region is mostly unaffected from the cold in the rest of the world.

Overview
Undergrowth is quite similar in level geometry to Drainage System, with only a few rooms being changed. A lot of the water from Drainage System isn't present anymore. At the far left of the area, a dark mushroom forest can be found, as well as a new, unnamed Echo. In some rooms there are flowers in the background that have animations and will close themselves when a creature strays to close then reopen when they are far enough.

Points Of Interest

 * Pearl_DS.png Green Pearl (Blank)
 * Scavenger Toll.
 * Echo.

Trivia

 * Undergrowth was considered a variant of Drainage System, but during its time in development there was no way to create such a different version of a region without having to duplicate and build off of it by defining a new region. This was prior to the conditional links system that allowed the developers to create such drastic variants of a region while still keeping it defined as one region, a technology used by the regions that were later developed. This helps to explain why Undergrowth and the corresponding Drainage System share many of the same Arena unlock tokens. Waterfront Facility also shares this history of originally intended to just be a variant but ending up to be defined as its own region.