Congratulations! You have reached the final Chapter of Dead Space 3 called Endings.
It is a thrill ride to say the least. While you are running you have the chance to pick up the last artifact of the game and at the same time complete the Alien Artifact set (if you picked up all the other alien artifacts in the previous chapters). Doing so will unlock the Alien Circuit Set you can use at the bench for another playthrough.
Alien Artifact 10
You are forced to run through this chapter. At one point you will have two alien growths blocking your way and two tentacles attacking you. Killing the tentacles will clear the path. TURN AROUND before you continue. You should see the artifact down a small path to the right.