Mostly Flesh and Steel Achievement in Dishonored
Mostly Flesh and Steel50
You finished the game without purchasing any supernatural powers or enhancements, besides Blink
How to unlock Mostly Flesh and Steel
Basically, DO NOT purchase ANY powers from the menu. Powers cost Runes, so you have a better idea of what they are, and by don't purchase any, I also mean do not upgrade Blink. Thankfully, you can upgrade your regular equipment, such as your crossbow, mask, etc. Please see "Ghost" achievement description for links on how this is all best accomplished.