Decent deal on greenman gaming if you haven't pre-ordered Fallout 4 yet.
The discount code expires Tuesday 3AM AEST. Fallout 4 is available to play from Tuesday 2AM AEST. Coincidence?
The pre-download is available on steam now so you can download it and start playing straight away at 2AM on Tuesday.
Seems to only work with non-discounted games e.g. Black Ops 3 is 28% off and costs $42.99. The voucher doesn't work to give you any further discount.
EDIT: I am an idiot and thought it was in AUD :-( Not a deal at all so marked as expired. Only reason I bought from them is I was expecting delivery issues on day one if I pre-orded from JBHIFI.
It's actually US$60, which is about AU$85. All prices on GMG are in USD as stated in their terms and conditions - http://www.greenmangaming.com/terms-and-conditions/ (Search for the word "dollars").
If you do want the game for AU$60, two good, legitimate options are to preorder in-store at JB Hi-Fi (online stock is sold out) or get it from Ozgameshop.