Using AFK Arena as an example, this model simulates the upgrading of heroes (units) in a mobile RPG. This is a complete version of a simpler diagram, whose general goal is to observe the rate of progression in terms of levelling heroes. It also identifies the key bottleneck moments where a particular currency is limiting the ability to upgrade heroes further. This full version of the model accounts for idle earnings, which the player will need when they run out of currencies to upgrade their heroes with. This allows approximations of how long it would take over multiple game sessions (excluding any additional mechanics) to reach a certain level.
