The Engineers come from an unknown homeworld. Their technology is very advanced, but it's especially advanced in Genetic Engineering. The Engineers are credited for the creation of humanity, and are revered as gods for their part in their origin. However, they later decided that humanity needed to be exterminated for reasons unknown. However, it seemed like a civil war took place on the their world, and it nearly wiped all of the Engineers off the face of the planet, leaving one in a dormant state.