Hello, so in EULA - Unreal Engine we have:
"You agree to place the following notices in the credits (replacing xxxx with the current year) for any Product, to the extent such product has credits:
“[Product name] uses the Unreal® Engine. Unreal® is a trademark or registered trademark of Epic Games, Inc. in the United States of America and elsewhere”"
In games I see that developers put this notice on the “Game Splash”, but my “Game Splash” visible only about 0.5 second.