Why is there no documentation on the new Project Launcher in 5.6?

[ORTyOW]

found a solution

Startup Movie not being build via Project Launcher in 5.6

I am using Project Launcher instead of default build packaging because apparently you can’t do a proper Shipping build without it and it’s a known bug for a couple years already that if you try a Shipping Build it will still have a Debug console etc so it will be Development build not Shipping. If I do a build through a default method it will have a startup movie but if I try this with Project Launcher there is no intro before my game menu. Also an additional question, why did they remove most…