Prometheus in Mass Effect game series

In the Mass Effect, a game series first made in 2007, the 'Protheans' are an extinct ancient race which mysteriously vanished over 50,000 years ago. The Protheans arose from a single planet and developed an immense galaxy-wide empire encompassing many other spacefaring species

The Protheans have been credited with creating the Citadel and the mass relays, feats of engineering that have never been equaled and whose core mass effect field technology forms the basis of contemporary civilization. Prothean artifacts, therefore, have immense scientific value and are seen as belonging to the entire galactic community.