Shepard: "[The Hanar] worship your people as gods."
Javik the last Prothean: "Pity we did not teach them to speak better."
So, an untold number of years ago an immensely powerful species came, built a civilization, then for whatever reason left. But what happens when a younger race comes across their incredibly advanced technology
or other signs of their presence. Often, religion.
Finding the ancient race is a frequent goal of these people, woe betide anyone who gets in their way.
It's not uncommon for such peoples to adopt the tech of their "gods"
Bonus points if the Precursors
actually did create the species that worships them.
tend to use these cults as pawns, if they didn't set them up themselves. Others are more likely to be somewhat annoyed.
- Most of the patron-lines in the Uplift universe act like the mythical Progenitors that began the whole uplift tradition were gods. Some of humanity's worst enemies are those who believe the Progenitors will return to cleanse the galaxy of "impure" species like us uppity wolflings.
- In Stargate SG-1 and Stargate Atlantis the Ancients are sometimes considered to be gods. They don't really care that much but their evil counterparts the Ori demand worship.
- The Lizardmen of Warhammer worship the Old Ones, who created the world and try to carry out their plan for the destruction of Chaos.
- The Covenant of the Halo franchise are a coalition of species united in worship of the Forerunners. Too bad that humans unintentionally defiled some holy Forerunner ex-colonies.
- They also mistakenly believe that the Halos will lead them to where the Forerunners left to. Instead of being superweapons that can destroy all complex life in the galaxy.
- In Sword of the Stars the Zuul worship their Suul'ka creators and are determined to find them in Lords of Winter they succeed
- In Mass Effect the Hanar believe the Protheans (whom they call the "Enkindlers") uplifted their species millenia ago. And the heretic Geth worship the Reapers of course they're still around