Left for Dead in Ravenholm is a two-level Campaign for Half-Life 2 that recreates gameplay from Left 4 Dead within the Half-Life 2 universe. Joined by Alyx, Barney, and Father Grigori, you must journey through the Zombie-invested town of Ravenholm in search of rescue. Together, you fight your way through a residential area in the first level, “The Neighborhood”. Then, you fight off Zombies in the town square while waiting to be rescued in the second level, “Town Square Finale”. Both levels feature a scripted version of the “Director” system found in Left 4 Dead, which constantly evaluates the Survivors and dynamically adjusts the difficulty and alters the experience accordingly.