The exploration of the space under South Tower was heavily inspired by combat maps from the Battle for Wesnoth video game. Cave terrain frequently has mushroom tiles, mining cart tracks, and old fortifications. And if you see a big stretch of water, you can be pretty sure a Tentacle of the Deep is lurking in it to attack any of your units that get too close!
Our music is sampled from Return to Wesnoth by Matthias Westlund (aka West), licensed under CC BY-SA 4.0, part of The Battle for Wesnoth Project. Visit them at wesnoth.org.