Daily shifts: Each UTC day has one of seven rules, such as a failing lighting circuit, no heating, supper left out or everything locked away; the rule changes how the floors are laid out or how the contamination is spread, is named in the lobby and stays with a shift you continue

Loud rooms: A room that reads loud can hold nothing, a little salvage, something left behind or a rare stash; the reading never says which

Personal best: Arriving on a floor above your saved best adds BEYOND YOUR BEST to the arrival message, once per run

Missing notices: A badge belonging to a resident on the lobby board is marked ON THE LOBBY BOARD