Arcade Paradise

Hidden packages are pieces of used chewing gum stuck around the building. There will ALWAYS be exactly three spawn each day. It is well worth the time to seek them out, as you get money for removing them. They tend to be stuck to tables or chairs, the sides of laundry machines, trashcans, the sides of change or token machines, and don't forget that there's two different spots they can spawn in the bathroom. I unlocked this achievement right before seeing the ending, so it will take a while.