The announcement opened up with a forest, showing a portal opening under a tree. When the player passed through they ended up in what appeared to be a graveyard. We then learned that the game is from The Astronauts, the team that made The Vanishing of Ethan Carter and had people that worked on Painkiller and Bulletstorm.
What followed was the main character pulling out a gun and beginning some fast paced first person shooter action. While not much was shown off just yet, the game appears to be be more of a call back to the older faster paced games. Finally the game ended with the revelation that it's called Witchfire.
In a press release after the show, The Astronauts developer Adrian Chmielarz said that the game was a dark fantasy shooter. He also admitted that he had little else to share. The game is still in early development and is not expected for some time, and he admits that they're mostly showing the trailer to remind people that The Astronauts is still around and is at least working on something, and something radically different from their last game.
One thing that Chmielarz did note was that Witchfire will use the same photogrammetry technology that The Vanishing of Ethan Carter used. This allowed them to scan real life objects and convert them into 3D models for their games, including buildings. Chmielarz believes he is able to push the technology even further than it was use in The Vanishing of Ethan Carter, and that it can be used to make their games more photo-realistic and natural.
Witchfire is coming to PC and currently has no planned release date.