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Defend Water Processors is a mission in Armored Core 3.


Requester: Kisaragi

Advance: 0

Upon success: 24000

Operation Area: Avia Gulf

Enemy Forces: MTs, Helicopters (Unknown Number)

Objective: Defend the water processing plants

Operation Code: Rumble Fishing

Client Name: Kisaragi

Place Name: Avia Gulf

Start Time: 18:30

Security Level: 6

Estimated Success Rate: 28%

Recommended Raven Rank: B


Someone is systematically destroying our water processing facilities in Sector 714.

A number of individual processing plants have already sustained heavy damage.

We've deployed units to protect those that remain intact, but it still isn't enough. We need a Raven to intervene immediately.

Take up position at the facility and make sure that no more of the processing plants are damaged.

That is all Raven, good luck.



Laine Meyers:Enemy AC identified. It’s Megalo.

Aster:This is Megalo. Commencing my attack.

Laine Meyers:Incoming transmission...Kisaragi has an urgent request. Two Crest bombers are closing on one of their facilities. They want you to intercept them. It’s up to you whether or not to accept. If you’re interested, a transport is standing by.

Laine Meyers:The transport is leaving. Mission request declined. Good work.

Laine Meyers:Transport destroyed, mission request retracted.

Laine Meyers:Processing plant 2 damaged.

Laine Meyers:Processing plant 2 damaged destroyed. Mission failed.

Laine Meyers:Processing plant 1 damaged.

Laine Meyers:Processing plant 1 damaged destroyed. Mission failed.

Laine Meyers:Processing plant 3 damaged.

Laine Meyers:Processing plant 3 damaged destroyed. Mission failed.

Aster:I’m withdrawing. All members of the assault team have been destroyed.


Funds: 6000c

Note: You will not be able to get an S-rank if you choose to bring a consort.


You don't have to worry too much about "defending" anything as long as you can defeat the enemies quickly. If you defeat all the MTs and helicopters, Aster will leave, and Squad 1 can clear them out themselves. Hover legs aren't necessary to complete the mission, but it will be very difficult to defeat Aster without them. To earn the S-rank, clear out the enemies quickly while ignoring Aster; once they're all gone, the mission ends.

If you clear the stage quickly enough, you will be offered "Eliminate the Bombers" as a bonus mission, and if you complete it after accepting it from here, you will earn the KES-ES/MIRROR part.


  • The MWI-DD/20 is hidden in this mission, from the starting position, head to the right side behind the pipelines. The part is lying near the edge of the area.
  • By completing this mission with the OP-INTENSIFY part equipped, you will unlock enhanced missile interception.