So, for my homebrew campaign, my heroes have travelled to Triaxus seeking an old jazz record (for obvious reasons). They figured out that the record was believed to be located in an archeological dig near the Skyfire Mandate. After taking a ride out there, to my player's surprise, they found that the 'archeological dig' is in fact a large mall, encased in a force field for the last three hundred+ years (during the winter).
Anyway, having gotten into the mall, our heroes discovered that the mall had been abandoned 300+ years ago, in part because it had a glitch gremlin infestation, in part because it was a stupid place to build a mall (it was an attempted planned community that didn't pan out). I have been having a lot of fun playing with what those delightful gremlins could do with three hundred years of uninterrupted 'playtime' with mall technology. Our heroes have faced ghost sounds, sudden holograms, an aggressively violent perfume kiosk, hacked plastic surgery robots, living food court options, and most recently a large gym with gravity alterations- meaning a room of falling gym plates.
My question for you- what else should a futuristic hacked mall have to explore and exploit?
