The Secret Base is an optional EDF Side Mission. It is available after beating The Ghost Ship or Far Mountain reaches.
Mission Summary[]
The Cycloids have set up a secret base. The base is a factory that is producing chemicals and radioactive materials. You must go in and shut down whatever it is they're doing.
Gameplay[]

From the start of the level, proceed to the left hallway. Go down the hallway with doors and windows, and at the end there is a teleporter that will teleport you to the top of the hallway. On the upper hallway is another teleporter which teleports you to another hallway with red blinking lights on the walls. At the end of the hallway is yet another teleporter which will teleport you to a another room. Enter the door, and go down the stairs into the dark hallways with the Protector Drones. Continue down the path, where you'll now be outside. Look for a stack of crates, which is where the blue keycard is. Once you obtain it, backtrack to the very beginning of the level.

From the beginning of the level, now go to the right hallway, and insert the blue keycard. Head to the door on the right and head through a couple of hallways until you enter a room with the yellow checkered floor. In the room, enter the room on the far left, and continue down the path until you enter another room with the yellow checkered floor. Watch out for the Pig Cops with explosive shotgun rounds on the right. Flip the switch on the left, and now go back to the beginning again. Head down the middle hallway til you enter an reactor room. Now from here, go back to the first yellow checkered floor, for a door opened up here. Go in and grab another blue keycard. Backtrack into the reactor room and insert the blue keycard in the control room. After a couple of seconds, the reactor will blow up.
Secrets[]
- After teleporting in the hallway with the red blinking lights, there is a misaligned wall on the left from where you entered. Open it to find a room with a slot 4, and slot 8 weapons, and some body-armour, and a gold amulet.
- Outside, From where the crates are, jump onto the shack, then jump to window to window, then finally on a platform above from where you entered outside is a First-aid, body-armor, and an amulet.
- In the big room, from the bridge, jump to window to window to get the amulet at the end (note, the secret will register around the second window).
Collectibles[]
- Melting Clock next to the Reactor Core switch

Other Items of interest[]
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