Modder Adam Pinkman used Grand Theft Auto V, and a lot of mod packages created to manipulate it, to recreate the Skyrim trailer in Los Santos. He succeeded, but not without a lot of hard work.
“It was quite challenging with the scenes,” Pinkman told Polygon in their story on the video. “I had to use other mods to accomplish these types of shots for instance. When people are panicking and rushing all over the streets, I used the Chaos Mod.”
As you might imagine, the hardest part was getting a dragon to appear in GTA V, which doesn’t have an asset in the game. Pinkman had to go to the lengths of modeling, rigging and animating a dragon in a 3D software program before compositing it into the GTA world.
Pinkman has plans to revise his video later by adding animations to the main character. Plus, it really needs a “FUS RO DAH!” at some point.