Got this email earlier today, 20% off storewide for their grand opening night of their Chatswood store on 31 Aug 2016 6.30pm - 9pm.
Fine prints:
* Offer only available at EB Games & Zing Pop Culture Chatswood on Wednesday August 31, 2016. Excludes consoles, POSA cards, Gift Cards, refurbished phones and tablets, and expo tickets. Other exclusions may apply. Not available on price matching. Not to be combined with any other offer. See staff for details.
So still cheaper at JB.