Digable planet

You're the only one that can save Mankind's fate. Find the artefact buried deep beneath the surface of the planet and be a true hero! The Galactic Governor has spoken: you're Mankind's only hope! Find the artefact buried deep beneath the surface of this unstable planet to give Mankind a chance for a brighter future! Hint: There are several artefacts buried on the planet but only one will save Mankind's future!