Quintín Bulnes

Volcanic activity frees giant scorpions from the earth who wreak havoc in the rural countryside and eventually threaten Mexico City.

An evil scientist runs a veritable army of LSD-crazed zombies.

After serving his conviction, a former gunman returns to his town planning to live a quiet life, however, the sons of a man he killed have other plans.

A hired gun wants to complete his last big job--killing a sheriff who hides away inside an old monastery--so he can retire with a prostitute.