Randomize is a new feature that allows you to add some degree of variance to the simulation results. With Randomize turned off, the simulation produces the most probable game score. When you Randomize your simulation, you can allow a little bit of chaos to factor into the game result and each simulation will produce a different result. You control the degree of random chaos by using the slider. Lower slider values introduce less variance in the score from the most probable outcome, while higher slider values introduce more variance. Try it out!