Passion, consistency, dreaming and a lot of things is used from David Wehlethe developer of The First Tree game. 
In this post, we will talk about an amazing journey about The First Tree Game

One of the most important keys to success is trusting yourself, believing that you can achieve some goal. For David Wehle, he had no knowledge about programming and he did a game and make a lot of profit from it.

How did he do it?
He was a designer but has no knowledge about coding or programming, but someday he collides with some library called Visual Scripting in unity game engine, and after many tutorials and thousands of google researches, he became able to make a full indie game using his skills.

How much time did he take?
As he said, it was not easy on him, because of his full-time job. But he was trying to system his time but working 2 hours daily to achieve his goal.

For the most interesting question, how much money did he do?
Also, according to his talking, he did more than 150,000$ from Steam only. That is a really big amount of money for a single-developer game.

The First Tree is the ultimate use case for the indie game developers, feel free to watch the full video from here: https://www.gdcvault.com/play/1025702/No-Time-No-Budget-No