Down Under is a Half-life 2 Mod that takes place between the period from the end of the 7 hour war and before Gordon Freeman enters City 17. The exact time of events is unknown.
Here's a very early look at an underground subway.
I'm planning on making a chapter, were you explore the underground subway.
I want to make this chapter feel dark and scary!
Still needs alot of work and might be changed later on in development!