"Go meet Jake on the 3rd floor". Some you had to do in sequential order, but other than that, we were turned loose to roam the halls, take the elevator/stairs and solve the hunt in whatever order we wanted over the course of about a week.
Turns out, Jake is the person who also handles payroll and direct deposit. You'd stop by, do your payroll stuff, have a little "getting to know you chat", he'd put his initials next to his spot on your scavenger hunt sheet, and give you a clue to how to find the next name or hunt item on the list. All of them directly related to something you would have had to do anyway to get 'onboarded' as a new employee.
It was fun, it was engaging, but it was also highly useful and germane to the usually boring tasks of "fill out this form to get paid, now fill out this one to get insurance, now this one for..."