The Undertide Expedition

Since almost the dawn of recorded history, the Ordem Des Preservantes has explored the world, uncovering locations and objects left behind by the Ancients and applying their advanced technology for the good of humanity. The latest "dig" is in an unusual location, however: Deep beneath the oceans, in a recently discovered ancient facility built literally miles underwater.

The first team sent to explore the ancient deep-sea facility failed to report back in. You're the backup. Your mission: Find the original research team, complete their mission if possible, and return to the surface to report your findings.