The Fallen Hero games aren't on itch, they're from Choice of Games. You can get them on Steam or in Choice of Games' "Hosted Games" mobile app. However, I honestly wouldn't recommend them. They are intentionally very obfuscatory. There's a lot of information that you aren't given, even though your character would know it and it's crucial information for the decisions you'll be making throughout the game. You basically need to play all of them before you can even properly RP the first one.