Accessed from 806
The players enters the first one (leftmost) from the cliffs while ignoring the lids of the other tunnels cannot be removed. By unlocking pipes through turning wheels, and switches the Chronon can be reached. Another exit blocked by double bars leads to the defense system entrance.
The cliffs are revisited in Submachine 10: The Exit through a karma portal stand in the karma studies facility. Two new tunnels can now be accessed while the ledge leading to the first one has broken off.
It seems that the tunnels have been connected to the Chronon by force, as shown by the dirt on the floor.
In the tunnels, the player can find the notes of the previous five (and more) researchers of the Edge, presumably sent by Mur to disable the defense systems. At least one lived there for some time and even made a "bed" in one of the chambers. He/she apparently left his keycard behind.
As the Elizabeth message was found in a secret area, it is perhaps a hint from Skutnik himself as to what the Player should do/what will come next.
However, the entirety of human population appears to have vanished or died from other causes, leaving no bodies. They only left their concerning notes behind.
|v · d · eSubmachine 6: The Edge Locations|
|Lobby - Cliffs - Tunnels - Chronon - Defense system entrance - Defense system corridors - Mainframe|
|v · d · eSubmachine 10: The Exit locations|
|Northern Garden docks • Captain's ship • OOO (Angel ruins ) • IOO (Royal storage facilities) • Storage unit 32/1 • Storage unit 33/1 • Storage unit 33/2 • Storage unit 33/3 • Storage unit 33/4 • OIO (Resin mine) • OOI (Iron pyramid) • IIO (Karma studies facility) • OII (S.H.I.V.A. access point) • IOI (Stabilizer bay) • III (Meditation temple) • Temple • Dock • Winter Palace • Cliffs • Tunnels • S.H.I.V.A. override corridor • Citric acid room • Root base • Rooftop • Research base • Level X • Lighthouse dungeon • Basement exit • Infernal basement • Basement • Metal section • Lighthouse tower • Tile rooms • Little island • S3C area • Desert|