There is an easter egg which can be found on most areas of the map where the walls will have "Tunnel Snakes rule" written in red paint or blood. This is a reference to Fallout 3.
Due to the lesser types of enemies, players can opt to hunt for Dune Worms in Tunnel instead of Desert and hope they drop the rare Circlets I.
Community content is available under CC-BY-SA unless otherwise noted.
