pay you a visit - or maybe they just wanted to use your obstacle course.
Either way, they're trespassing so use the Gun Cabinet Key on the lock by
your bed to arm yourself then go start eliminating the bad guys. When
you've cleaned up the house head outside and clean up the yard. Find anyone
lurking in the shadows by eliminating the shadows with some flares. You'll
eventually kill the boss then return to your house for a nice hot shower.