We all know game systems can have a huge impact on your game’s popularity, retention, and appeal. But are there ways to know in advance whether what you’ve designed will have particular results? Why yes, there are, and they are proven methods from decades worth of different online service games. Come prepared to think about math as we dive deep into the nitty-gritty of systems game design for retention. We’ll cover XP curves, Monte Carlo modeling, multi-opponent balancing, and more.