You might also like:

Undead City!

It happened. Nobody knows how, but the restless dead are invading the city. Anyone capable of wielding a firearm is called to action, a coordinated strike is necessary to prevent the last bastion of survivors from being overrun.

Place units along the blood smears, the undead seem to follow them mindlessly. Get to high ground and out of harms way whenever possible - they're ravenous for your flesh!