Dead Space Extraction game movie Full story , deadspace

This is game movie by the game Dead Space Extraction. I understand that many people make such films and upload then on YouTube. My difference from other similar ones is that I tried to convey the plot as much as possible, which intersects with the Dead Space Animated Comics and cartoon Dead Space Downfall, but it shows us from the other way how the Marker appeared on Ishimura and also reveals some points which Isaac will subsequently see when he will arrive for