THE BOUNCY BEEPS of Pac-Man. The percussive build-up in Legend of Zelda. The effusive gibberish of The Sims. The sounds in videogames tell us to speed up, start over, and of course, to keep playing. But how does one set of beeps so effectively tell you you’ve gained power, while another indicates your character has died? And how, exactly, does someone create the sound of the Dark Knight punching the Joker in the face? The answer: Genius sound design.