With the recent release of the new instalment of first-person shooter goliath Call of Duty, Activision is poised to make another cool gazillion dollars or so. In fact, the game is popular with many gamers except for one significant group -- the professional ones: "The new games can bring all kinds of changes. Guns fire differently. The physics of the world have been tweaked. This makes it challenging and fun for casual players, but it’s a nightmare scenario for pros. The most important thing for professionals is to be able to practice and play the same game, with the same rules, for years and years to hone their skills. (Imagine if they completely changed the rules of Major League Baseball every year, using different balls, spacing the bases further apart, adding a fourth outfielder.)"