Like a low-budget, noncomic version of "Zombieland," director Jim Mickle's "Stake Land" follows a teenage boy and a surly survivalist as they look for safe haven in an America ravaged by bloodthirsty monsters and human opportunists. There's nothing much new here, but Mickle and co-writer Nick Damici (who also plays the survivalist) bring grubby authenticity to a familiar story, avoiding camp and corniness. They also work in themes about faith and factionalism to rival George Romero at his most pointed. The "Stake Land" DVD and Blu-ray include two commentary tracks and ample behind-the-scenes footage, but the coolest extra is a half-hour of "character prequels," showing what life was like before the zombie/vampire plague hit.