I think if I remember correctly you have to go into the security guys metal locker but I'm not 100 percent sure. There are some walkthroughs of the game that can help you if you get stuck.
go to the left of the map and you will find a box full of grenades. collect the grenades and go to the center of the haunted house, where there is a car which you can hide behind. finally, throw the...
You cant always get them 100% free but you can download them for a 60 minute trial. I would definitely recommend buying them though because you will get really attached in 60 minutes ------- it is...