Marathon DCON locations and how to use them
Marathon leaves many systems unexplained, and DCONs are one such hurdle. These are terminals with antennae placed outside or on the roofs of specific buildings; you often need to find and use them for early quests before the game formally introduces them, sometimes while racing the clock.
On Perimeter you can find DCONs at: the North Relay (on the roof of the shelter just northwest of the North Relay, in the corner of the map); Station (northeast of Station, past the pipe near the northern walkway and the cliff); Overflow (directly west of Overflow near the cliffs, not far from the main building); and South Relay (in the hills in the far south, past South Relay and Columns, much further from the main POI than the others).
On Dire Marsh they appear at: Complex (outside the building in the marsh, south of Complex, east of AI Uplink); Greenhouse (on the south side of the building in the hills just north of Greenhouse); and Quarantine (outside the building in the marsh directly south of Quarantine).
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