Sir Darron Gowar said:
Let's say there is no assassin in the followin scene:
Assuming no key, how would you go about attempting to gain entrance to a dungeon complex, wherein a locked iron door stands in your way?
8) Knock on the door and talk to whomever answers.
9) Find out who has the key and acquire it. (Assuming "no key" means "no key in your possession")
10) Find out who made the lock and learn how to open it from them.
11) Hire a burglar to pick the lock, then cuff him on the back of the head and tell him to find honest work.
12) Hire a locksmith to pick the lock, then cuff him on the back of the head because he probably used to be a burglar.
I don't have a point about skill systems, I'm just surprised nobody at least mentioned number 8. What kind of adventurer is too shy to knock?