Lore / Puzzles in Upgraded Rooms?

[Roan]

I upgraded the Billiard Room to the Speakeasy and noticed some additional writing and a note in the room. The writing says something about the mice coming out to play while the note is related to the moonshine smuggling subplot.

Curious if there are any other upgraded rooms that have additional lore like this? Not sure I have the patience to go through every single upgrade on new files so just figured I'd ask here.

[Badgerlord]

I don't think it's a puzzle so much as it's just a bit of lore around something else going on that's in a few other areas. If that makes sense. I found another room where the Moonshine was hiding, it also had an upgrade disk, and, I think it had a blueprint but I cannot remember

[Roan]

Originally posted by Badgerlord:

I don't think it's a puzzle so much as it's just a bit of lore around something else going on that's in a few other areas. If that makes sense. I found another room where the Moonshine was hiding, it also had an upgrade disk, and, I think it had a blueprint but I cannot remember

Yeah found that one already. Was just surprised to see some lore included in an upgrade room!