I've just found out that I should have picked up a stun gun in Heather's bedroom but am now way past that part of the game. Does anyone know if I'll get the chance to pick it up anywhere else further into the game? I really don't want to go back that far.
Sorry, the stun gun is only in Heather's room. But if you complete the game and get any ending then go back and do it again you will pick up a Katana, a Flamethrower, and a Submachine Gun.
Oh and if you take loads of damage throughout the game and survive (Total up as many hits as you can without dying) you will see a second ending where Heather kills Douglas.