Eradicator/Relay Away (0B)

Eleena Intro: Relay Away (0B)
You've crash-landed at a satellite relay station. Take the tunnel nearby and enter the base. First off, there are several secret areas to be had right away. Past the bay window on the left are two consoles side-by-side against the wall. Activate the taller of the two, and it lowers, revealing a switch hidden behind it. Hit the switch, and a lift on the floor leading down to outside opens nearby. (The outside area and the little space with the switch each count as a secret, so that's two for one.) Back inside, immediately opposite the hidden switch is a column rotated diagonally to the walls, with equipment on it. Activate it, and it raises up, with a Geosurvey in a secret compartment underneath. Finally, at the far end of this room is a nook up on the wall that's counted as a secret area, with ammo inside.

Core
When you're done, take the big lift in the corner down to a small room with two doors. Go to the one on your right, and hit the switch inside the room. This opens a shield and reveals the power core to the transceiver, which you'll see on the PIP. Go back out to the left-hand door, which leads to the room with that power core. Shoot at the core repeatedly until it's destroyed. If you're having trouble impacting it, aim toward the bottom of the core.

Ducts
Next, shoot the lower of the two gratings nearby and follow the duct to a stream of sludge. Follow the stream to where it drains into a tank. You'll see a shootable switch to your left along the way. When you reach the tank, shoot the switch to open a secret area alongside the tank, with ammo inside. Shoot the grating on the far side, and follow the ductwork. You'll see some rubble at one point. Shoot the wall here to reveal a secret area. (Look on the automap for the spinning ammo/health symbols in the black area if you can't find it.) Continue to a cave with a hole in the floor marked with the "exit" texture. (If there's a security field blocking the cave, destroy the core first.) Jump down the hole to enter the Citadel.