This is a heavily modified layout from Unreal Tournament 4’s “Underland”. The map has been expanded and given a completely new art style. It works with all arena gamemodes and works especially well for infection with lots of tight corners and spots to make a last stand.
Here is a write up that GIazednConfused made for the layout changes. https://jasonvento.squarespace.com/game-projects/project-four-l3zw3-k2dd7?p
