FIREBASE Z

Turn on the power and activate Pack-A-Punch.

Talk to Peck in the Mission Control Room.

Talk to Ravenov in the Atrium and grab the ID Badge he gives you.

Grab Truth Serum from 3 lockers around the map:

• Equipment Storage
• Engineering
• Colonel's Office

In the Field Hospital, use the Chemical Mixer and kill the Hellhounds it spawns.

Interact with the Chemical Mixer again to Transfer to Gas Dispersal Device, then pick up the Agent Delivery System.

Place the Agent Delivery System on the vent outside the OPC.

Talk to Peck in the Mission Control Room.

Interact with the machine upstairs in the Data Center to pick up an Essence Trap.

A Mimic will be in one of three locations — find it and lower its health without killing it:

• Peck's Quarters
• Motor Pool
• Military Command Control Room/Sky Bridge

After lowering its health, throw down the Essence Trap and use it while the Mimic is on it to trap it.

Quickly bring the trap back to the Data Center and place it in the machine. If you captured the correct Mimic, the machine gives you a code.

Repeat this 2 more times (3 total) — you'll need to end the round between attempts to spawn another Mimic.

After inserting all 3 Essence Traps, the machine gives you a Floppy Disk — pick it up.

Place the Floppy Disk in the computer in the Planning Offices.

Enter the newly opened OPC and talk to Peck.

Open the locker to the left of his window and grab the Aethermeter.

Pick up a Shovel in one of the rooms at the Scorched Defense.

Open Lot:

• Listen for a beep in the Open Lot, then dig up the Aether Canister when you get the prompt. This spawns a lot of Aether Canisters around you.
• Find and collect the Aether Canister that doesn't have any black smoke coming out of it.

Jungle Defense:

• Dig up the Aether Canister in the Jungle Defense to start a lockdown.
• After the lockdown ends, grab the canister.

Grab the Blueprint in the Weapons Lab.

Interact with the corpse in the Scorched Defense to get an Eye.

Use the Eye on the retinal scanner in the Weapons Lab — this opens a drawer containing a Key.

Obtain the 3 parts of the RAI K-84:

• Barrel Assembly — Use the Key to open lockers in Barracks 1 & 2 until a Mimic spawns. Kill it to get the Barrel Assembly.
• Aetherium Converter — Interact with the computer in the Weapons Lab to see a radar with a moving part that stops 3 times. Note these positions, then shoot them into the dart board in the Village Mess Hall in order, followed by the bullseye. This opens the dart board and drops the Aetherium Converter.
• Charged Power Cell — Kill a Mangler by shooting off its arm cannon while it's charging an attack; it drops an Uncharged Power Cell. Place it in the slot on the table in the Weapons Lab and wait 2 full rounds, then pick up the now-Charged Power Cell.

Build the RAI K-84 on the workbench in the Weapons Lab.

Barracks (3rd Canister): This canister is in the Barracks. After digging it up, don't get too close — it'll disappear. Instead, shoot an alternate fire shot from the RAI K-84 at it, then quickly run over and pick it up.

Place each of the 3 Aether Canisters in the 3 Reactors.

Walk into the APC.

Interact with the computer in the Planning Offices and move the cursor over the star with the "?", then confirm it.

Head to the APC and interact with the Terminal to start the boss fight.

The boss fight is about killing the Orda and surviving. Its weak point is its mouth when it screams and its mouth turns orange.

Once you defeat the Orda, the Main Quest is complete.