Crosshair added that features enemy detection ( simply becomes red on enemy / hit object ). And included destroyable objects with PhysicX:
( camera is shaking because a heli is crashing in the Background

)
https://youtu.be/qtrt4o5eWhU
Pathfinding:
https://youtu.be/MiIqHaoSY14Gun interaction shot ( added wall and screen blood splats btw ):

First "gameplay"/"killthrough" video ( running around killing some Zombies )
https://youtu.be/U4xX_Te7BIYGreets