Find out formulas for existing football game

This personal project consists of finding out two formulas for a football game (eFootball PES 2020): - overall rating formula, ie. how the overall rating is calculated based on the stats of a player - player growth formula, ie. how the stats of a player grow depending on the player level The information might already be available in different forum and sites, and there are a number of websites and applications that allow searching and seeing different projections of the player - I can provide more guidance to the selected bidder. The focus of the project is in accuracy: the game includes a built-in editor that can be used for checking the accuracy at least of the first formula, and likely the second one as well. I would be happy with any approach (ie. researching information, trial and error, both) that leads to as accurate formulas as possible. The ideal candidate would be familiar with the game and its ecosystem. Please note that this is a completely personal project: the results will not be made public, but instead be used by me for finding the right players to improve my poor skills :D