How those people get character like Darth Vader in their game?

Development Character & Animation
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1

How do I get characters like Darth Vader into my own game.
Ex Video: Star Wars Darth Vader Unreal Engine 4 DX12 - YouTube
Thanks.

2

I think CryZENx created the model and animations. https://www.youtube.com/user/CryZENx/videos