How many movies have Brenna O'Brien and Todd Sheets collaborated on?

They have worked on 4 movies together! Their first movie together was Vampire Holocaust (1997) while their highest rated movie together was Zombie Bloodbath 3: Zombie Armageddon (2000). They have not worked together since Zombie Bloodbath 3: Zombie Armageddon (2000). They are most known for their horror films together.