Computers are deterministic machines: by design, if we give a computer the same input multiple times, in the form of program code and data, then it returns the same output. Therefore, how can we have a program return unpredictable and random outputs?
If we need truly random numbers, then we need to take this randomness from somewhere else. That's why many advanced applications try to combine different external sources of randomness into a random value: they may look at the movement of the mouse in a certain interval, to the noise of the internet connection, or even ask the user to smash the keyboard randomly, and so on. There is even dedicated hardware for random number generation!
Fortunately, in games, we ...
