User blog comment:X-Machinist-X/Dishonored random stuff/@comment-26947588-20151011222025/@comment-1500935-20151013155915

What I dislike with free-roaming worlds (assuming you mean open worlds) is that, past some time, you already know the map by heart and have nothing left to discover. Fragmenting the game in missions, you are bound to discover new things. For example, I didn't know of the radio booth in the backyard of Holger Square until my 4th or 5th playthrough of this mission. Same goes for a maintenance room under the building's front facade, accessible from a crawl space and where you witness two overseers inside Campbell's hidden room, looking for his black book.