Skyrim

If you've played an Elder Scrolls game, you're probably familiar with the glowing Nirnroot plant, valued for its healing properties. If you're also playing Fallout 4 (who am I kidding, of course you are), you may have stumbled across an "experimental plant" that looks an awful lot like Nirnroot aboard an airship research station. 

I know what you're thinking, "it's just a reused asset," but, consider the notes from the scribe who discovered the plant in the Fallout universe: according to him, the plant emits a light that is a result of bioluminescence, not radiation, and makes him feel stronger when he drinks a tea made from the plant. Could they be the same plant?

It may very well be that these are totally different, but it's fun to speculate about a connection between these two universes.

Time to beat people with brooms and exploit horrible AI!