http://www.bestbuy.ca/en-CA/e3-games.aspx
Saw $10 on the games on the list and get 800 reward points on selected titles as well. 1600 if you're part of the gamers club. Only until the 7th though.
Looks like I'll be making another trip there soon and I was just there last night, as well as...
http://www.futureshop.ca/en-CA/product/the-witcher-2-xbox-360/10181838.aspx?path=67fc4a9a8dd14c5a6364b2ad36418b84en02
You also get a gift card worth $10 at Future Shop for a game that is released in May