https://www.youtube.com/watch?v=Kzk-TztczQw
The game contains a lot of images and this is part of how they are done. Daniel ,who writes the story, comes with information about situations in the game that could be told with an illustration.
After some "pen and paper" ideation I get going in Photoshop, some times (as in this case) with some simple 3D as a starting point.
Next comes the animation, but you will have to wait for Ep 2 to be released to see that one.