In the trench corridors beneath Khepri-9, a unit escorts Registry Vault Twelve into a hidden shaft.

Something tunnels through the structure, breaching walls and stripping data cores as it closes in.

The vault is forced into position as orbital sterilization is called in above.

Tunnels begin to collapse around them, corrosion eating through armor while oxygen drops with every movement.

The squad fractures under pressure, shifting from escort to containment as routes disappear.

This is: "Vaultfall" by Sascha Schmidt