Make sure you click add to cart and then apply the discount code at the bottom.
If you are buying it on a mobile device 'request desktop site' as I couldn't find the coupon code area on my phone.
The site applies its own conversion to AUD and bills it through PayPal as AUD so you won't get hit with a conversion fee.
If you have an international card like 28degrees with free conversion make sure you pick USD at the bottom of the site before adding the game to cart as it works out slightly cheaper.
How good is the singleplayer on this?
I've been looking for some singleplayer rpgs recently (cuz my internet sucks donkey dick) and was wondering if this would be worth it?