Bloodborne has hit the $20 mark several times, but always bounces back up to $40, so pick it up if you haven't yet. I think this is the first time Until Dawn has been this cheap.
http://www.bestbuy.ca/en-CA/product/bloodborne-ps4/10295157.aspx?path=326b4a956f63b22e04a1425e9732d852en02
http://www.bestbuy.ca/en-CA/product/until-dawn-ps4/10372019.aspx?path=130e5ce810a5fb71def9e9354ac8cc78en02
http://www.bestbuy.ca/en-CA/product/bloodborne-ps4/10295157.aspx?path=326b4a956f63b22e04a1425e9732d852en02
http://www.bestbuy.ca/en-CA/product/until-dawn-ps4/10372019.aspx?path=130e5ce810a5fb71def9e9354ac8cc78en02