Very direct players could work through the game in 12 hours, though.
Upcoming first-person action game Dishonored could take as much as 28 hours to complete, according to the game's co-creative directors Harvey Smith and Raphael Colantonio.
"Play-style matters a lot. Very direct players will probably get through the game in 12 or 14 hours. Explorers who eavesdrop a lot will take twice as long," answered the pair on the Bethesda Blog.
The duo also confirmed information about the powers in the game.
"There are six major active powers and four enhancements (passive powers), in addition to weapons and gadgets; plus there are 40 bone charms in the game that grant small supernatural perks. But no one can have all of these things in one playthrough."
Dishonored is due for release on Xbox 360, PlayStation 3 and PC on October 12.