I'm doing my first play through* of Dishonored and since I'm going the full-stealth route, the process will be slow.
I wondering though - Can you return to earlier maps in Dishonored to grab goodies and upgrades you didn't fetch in earlier missions?
Because if you can't I'll either need to lose some spontaneity of play to search everywhere, or read spoilery walk-throughs beforehand.
* Yes, I like waiting a few years before playing a game. Let them age like fine wine.