|Aaargh! The Horror!|
Back to the point... So XP for killing stuff only tends to lead to PCs laboriously searching out monsters to off and turns them into perpetual motion machines of death and destruction. Also not desirable. "Hello! Dungeon extermination service, you're through to Conan, how may I help you?"
So, how does this XP stuff get doled out then? Well, for killing/defeating stuff; there is some for treasure but it's a tenth of treasure in XP; and of course goal completion and good role play. Now lots of people don't like the last one because it is a bit arbitrary. Deal with it. It is the GM's role to arbitrate. Obviously how well stated the PC's goals are and how successful they are at achieving them is going to influence the amount of XP they get for that sort of thing. If they plan to rob a wizard's tower of a certain spell book, preferably without drawing too much attention to themselves from either the wizard or the authorities then getting in and out ninja style is going to be worth way more than slaughtering the wizard and stealing the book amidst Godzilla movie level carnage.
|XP for Subtlety: Zero|
|Being bitten by a radioactive spider has its perks|