A breacher squad enters a derelict moon fortress to secure control nodes and stop a failsafe weapon from activating. Inside, the dead are being used as part of a growing system that spreads through the structure and takes control of its machinery.

The deeper they push, the more the fortress shifts from abandoned to active, with bodies and metal merging into something that reacts to their presence. Gravity turns unreliable, comms collapse, and the structure itself begins failing while the system continues to expand.

What starts as a containment mission changes when the weapon begins to activate...

This is "Moonbreaker" by Sascha Schmidt