The Divide (2011)

When New York City is decimated, eight survivors take refuge in the basement of their apartment building and hope for rescue.  Soon they are facing armed intruders in hazmat suits and the prospect that help may not be coming.

The stress of being trapped together, a dwindling ration of supplies, and a feeling of hopelessness brings out the worst in some and causes others to crack.  They split into two groups, which could essentially be described as those who have lost their humanity and those who endeavor to retain it.  The film is dialogue based with little action, and the movie is depressing and unsettling.  Needless to say I did not enjoy it.