https://www.notebookcheck.net/New-cozy-free-to-play-game-tops-Steam-charts-with-over-300-Very-Positive-reviews-just-two-days-after-launch.1057272.0.html

Developed by Blender Studio, the game introduces players to a gorgeous winter landscape. You play as a cute, fluffy dog, with a small child in tow...

This is Blender Studio's showcase for what's possible using fully open-source tools. The entire project — assets, animations, and code — is made with Blender and the popular Godot Game Engine.

Unlike industry giants such as Unity or Unreal, Godot is completely open source.

This should make it great for small studios and independent creators, as it lowers the entry barrier to game creation. Because everything is free, all you need now is skill.

And this game shows that you really can create something with it.

Downloading Dogwalk is of course 100% free, which fits neatly into its open-source philosophy

They could have charged money if they wanted to.