You will have to be fast with the revolver to finish with all the zombies. Point and shoot with the mouse. Press R to reload. Move with W,A,S,D. Change weapon with 1,2,3.
This fear and action game is very similar to the known Alien Breed for Pc. Get into a starship with Aliens. Use W,A,S,D to move. Shoot with the mouse. Change weapon with Q and E. With the space bar change messages and open doors.