Hollywood effects studio Spectral Motion were hired by Sony to create a little something for Horizon Zero Dawn's E3 demo. The suit they came up with ended up being one of the lowkey stars of the entire show.
Image: Rick Galinson As you can see, it goes way beyond your usual E3 cosplay performance, seeing as it's basically a giant robot dinosaur puppet that looks every inch like it came from a place that works on big movies (Hellboy II, Looper, X-Men: The Last Stand) for a living.
Below is video showing how well it actually moved.
(Video via Nicholas Baumann)
If you need to compare, here's the game's E3 demo: