The Train Tunnels are directly adjacent to the Underpath, which is accessible from Překážka. Parts of this area can also be seen using the Smart Vision augmentation from Překážka, but access between the Underpath and the Train Tunnels is not possible.
There are two entrances into the Train Tunnels from the Ludvik's Lounge courtyard. The main entrance is a locked door accessible by a keycard obtained during SM00: Neon Nights. The locked door is destructible, meaning that it can be destroyed by sufficient gunfire or other munitions, such as a grenade. The second entrance is a breakable vent cover to the left of the main entrance.
The Rave Edit