- Earth in an early star-faring stage
- Solar system is kind of boring
- Mundane colonization beginning around nearby stars
- Explorers find a planet completely covered in ruins of an alien city.
There are alien artifact, although mostly not near the surface. The good stuff is down below.
Unfortunately, there may also be experimental life forms in stasis, or weird alien breeding machines. Fiddling with the wrong machine may result in the release of "goblins", or "balrogs". The style of the campaign can thus change over time, based on what the explorers do.