Came across this coupon code while playing around with this script
Buy 1 Value Range Pizza, Get 1 Free by entering 470486
Seems like this code only works for selected stores.
Just in case anyone is wondering, I used this code at Tranmere, SA 5073.
Alternatively, install the script with greasemonkey or tampermoneky, click on the "ninja turtle head", then click on "2 value pizza 50% off" and check if it applies.
for more information on installing this script see https://www.ozbargain.com.au/node/212782 and http://forums.whirlpool.net.au/archive/2237160
for those who can read javascript,
change code on line 420 to
return showStatus('Voucher ' + code + ' loaded. Value: $' + money(window.prices[offer][pos.priceIndex]), false), updateBasket(), true;
to reveal code
didn't work at my store