Completed this over the weekend. Basically it just ends after the last mission. You can load up your save file which brings you to your camp just before you pursue the last mission. Things were getting out of control. Infestations, Hordes every couple of minutes so I admittedly ended it out of necessity. Still in the Savini house. I think my opportunity to get the warehouse had gone by. I just couldn't seem to keep my head above water. It was beginning to wear out it's welcome in that way. Very fun game overall though. Great value for what you pay.
-2 for the strange glitches and unsteady frame-rate.