Investigate Water Swells is a mission in Armored Core 3.

B988A M-Type

B988A M-Type Lifeform towards the end of the mission.


Requester: Kisaragi

Advance: 0

Upon success: 45000c

Operation Area: Drainage L9

Enemy Forces: Unknown

Objective: Investigate the sewage system

Operation Code: Doodlebug

Client Name: Kisaragi

Place Name: Drainage L9

Start Time: 23:30

Security Level: 2

Estimated Success Rate: 40%

Recommended Raven Rank: C


Our sensors are registering unusual swells in the sewage system's water levels. As far as can be determined, it's not the result of rival corporate activity.

We can only assume then that a system malfunction is to blame. Nothing like this has ever happened before.

In any case, we've lost contact with the research team sent to investigate. We need to know what is happening as soon as possible.

Find out what's going on and report back. You have permission to eliminate any who attempt to interfere.



Laine Meyers:Our scan detected multiple heat sources. Be careful.

Announcement:System activated. Lowering flood control gates.

Announcement:Gate lock released.

Laine Meyers:The control panel shorted out. Lower the water level. There must be someway to regulate the flow...

Laine Meyers:What the...!?

Laine Meyers:I don’t believe it! What’s been happening here...?




This mission starts out easy. The goal is to boost to the very end of the long hallway, pressing the gate lock release. Afterwards, boost all the way back to the now-open gate.

Once you've reached the B988A M-Type, the mission gets fun. A tip on how to easily destroy the bio weapon. You must be efficient in using your energy. You may want to use a hover leg AC to dodge its attacks. It is suggested to destroy the B988A C-Type smaller units first. Do not forget to equip bio sensor capable apparatus for easy aiming.


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