The station you start off in is Skhodnenskaya, an abandoned part of Torn station after if was attacked by mutants. As you go on a bit you get to Tushinskaya, which is the new Torn station which the civilians have retreated to. In this station there is a downstairs (door behind gun stall) and a staircase to the surface. I have added Shchunkinskaya, Oktyabisoye Pole and Polezhayevskaya (there empty for now) and will add Bogovaya soon, and a surface entrance to each (Bogovaya will only be accessible through the surface). I'm also hoping to add the voices of the dead (called singing pipes by Khan in the game metro 2033), gas masks, loads of easter eggs and security at each station.