The following is a tutorial showing you how to modify the game's running memory to allow you to purchase anything that costs gold for free. There may be other applications for this but a have not looked into anything else.
Things you will need:
1) The game installed and up to date on your device.
2) GameKiller (my version is 1.90)
3) Some knowledge of hex editing
I take no responsibility for any bans received as a result from attempting this. I have been doing it for a few days with no such consequence but just be aware.
Alright, let's get to it!
