Steam has opened up its Global Gameplay Stats, listing the percentage of all players who have earned achievements in various Steam titles. It makes for some interesting reading: only 30% of people who bought World Of Goo have finished it, while only 76% of Portal owners have got to the fully-functional Aperture Science Handheld Portal Device stage. It's like a monument to incomplete gaming experiences, and reminds me of Lego Star Wars creator John Smith getting up on stage to sing an ode to games he'd never finished, at the Nordic Game convention last year. I wish I could find a recording of that.
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