so this is how i went about creating the prop from the game.
This is but one way to make this prop. im not an expert so there are probably better ways to make parts of this, this is just a guide to make it how i made it.
The second photo is one i found on the internet that i used to make my chainsaw . it is from here: http://stuffpoint.com/lollipop-chainsaw/image/24173/juliets-chainsaw-picture/
Step 1: Materials and tools
Acrylic plastic. or 9mm wood or something like that.
car body filler. P38 polyester filler is what i used, but there are many affective fillers.
glues of many types, two part epoxy resin, wood glue, super glue.
masking tape, lots of tape. double sided tape. electrical tape.
nuts and bolts. dome nuts (m5) m5 threaded rod.
random bolts and screws and washers for detailing.
thin card or thin styrene
main part materials are the back handle and top grip. i got mine from eBay
files and sand paper.
cutting tools, lots of snap off craft knives and scalpels
jnr hacksaw, large hacksaw blade. saw of some description.
A rotary tool is always useful
workshop tools like clamps and a Vice and work benches will always be useful to hold work while working