Ren'Py Video Game Engine

https://www.renpy.org/

https://www.youtube.com/watch?v=vith10gG8L4&list=PL8gnyyQEz5CGTzHWF8thIfUg92ffs7T7P&index=1

https://www.youtube.com/watch?v=C3Ldd-5PKCw - Ren'py Basic Tutorial (Learn with only 44 Lines of Code!)

https://www.youtube.com/watch?v=zqc5Bl12mCM - Ren'py UI Tutorial (in 5 1/2 Minutes)

https://www.daz3d.com/

https://www.daz3d.com/shop/

http://www.katawa-shoujo.com/about.php

https://www.youtube.com/watch?v=8N5hgp0SMwM