It’s incredibly satisfying to sneak out of a tight spot by performing an action you didn’t know you could do, but created instinctively because of your experience.

That’s how I want to learn. Don’t give me a book; I don’t want a lecture, and I don’t want a list of topics to memorize. Give me ample reason to memorize them and a sandbox where I can safely play.

Michael Lopp on game design, learning, gamification and, most importantly, Portal.