The humans that had clustered around its storage container were not there. All that was a pile of gore, and three zombies. It crushed one that was close to them, but did not bother with the others. Prioritize searching for uninfected.

More rooms. More infected. Some that thought they weren't, but it could smell their bites. Those ones tried to follow it. They were a danger to the uninfected. It killed them too.

It kept moving, opening doors it had access to, stopping at doors that it didn't to listen closely. Nothing. The implant in its head kept pulsing, and it kept searching.

It didn't know how long it had searched, but it had passed through the sterilization hall three times before it heard the gunshots, echoing from far above.

It walked faster, tracking the sounds through the corridors. Every surface reflected sound, confused the location of the noises, but it knew this facility. It had been ordered to memorize its layout.

The gunfire eventually stopped, and its fists clenched. It hadn't heard any screams, but the silence sounded like failure.

Small, running feet. Target. It moved to intercept.

There. A human. And an zombie between them, rising from its post-infection stupor.

It advanced toward the zombie, bringing a foot down on its back and forcing it back to the floor.

The sound of its spine snapping was satisfying. A sign it was still working correctly.