Whenever I hear of a zombie movie or game or zombies in general. I always wonder how does it start or where did this begin.
My theory for the outbreak in this game before I got further through the game was that the zombie outbreak started because of Sam B's song "Who Do You Voodoo." I seriously thought that there was a voodoo lady or gentleman in the forest that thought that's his song was offensive and cast a potion on someone to be under his/her command to kill Sam B, but utterly failed and cause the outbreak. Then it spread from the jungle to the resort and that's when you begin your adventure.