Modern games (say, since the playstation 2 generation) tend to rely on clocks to compute animations. This is most obvious today when consoles often get several

Modern games (say, since the playstation 2 generation) tend to rely on clocks to compute animations. This is most obvious today when consoles often get several different clockspeeds across their release lifetime--my current xbox one is faster than my original xbox one by a tangible amount. It's also necessary when different parts of a 3d scene will render at different rates--you don't want to be able to slow the animation down by looking at something complex.