Siren Head SCP-6789: The Hunt Continues

Few months ago my wife and I escaped from siren head. Or we thought so...Siren head was hunting us, trying to kill us. So for the sake of our family and friends, we decided to escape the city and fight him in the mountains. These are the five longest days of our lives. And most dangerous. Protecting my family, my wife, our daughters, hunting, surviving...
Mouse 1 : fire weapon Mouse 2 : raise sights or block W, S, A, D : move player Left Shift : sprint Left Ctrl : crouch X : prone Space : jump F : use item R : reload G: grenades H : hols