This has been going for a few weeks now that I know of. I would of thought someone would have posted something up, but they haven't, so here it is.
20% off on games and game accessories at Harvey Norman in Sydney, Martin Place.
I purchased a couple of items a couple of weeks back.
An Xbox One controller, normally $78, after discount it's $62.40.
Also Xbox One games are generally $88, after discount it's $70.40.
In addition, they have 1 x Day one edition of Dead Rising 3.
Plug and charge kits for the Xbox One are normally $28, after discount it's $22.40.
They also have PS3, and Xbox 360 games, but they're generally at full retail at the original release price, so after the 20% it's still ends up being overpriced.
I don't remember if they had PS4 stuff. Maybe someone else can check or I can update it if I go again.
EDIT: My friend and I just purchased a PS4 console there with BF4 @ 20% off. (6th Feb 2014). The deal is still on.
Enjoy and score yourself a bargain!
by memory their gaming section was extremely small (and limited)… probaby why nobody has posted this yet.