Deadlands 2: Trapped

Deadlands 2: Trapped (2008) is a horror, science fiction, thriller directed by Gary Ugarek rated 5.8/10.

The United States Government has developed a highly effective nerve gas that is unleashed upon the residents of a small Maryland City. During the top secret exercise the infected citizens begin to convert each resident into a sort of living zombie, until the remaining town residents, 6 total strangers, are trapped inside a movie theater cineplex.