Yeah games cost a lot, but they are often spending a lot on their marketing.
The Witcher 1 cost 20 million to develop, Witcher 2, 25 million. The Witcher 3 cost 81 million including marketing. Now that game also had over 500 voice actors, amazing graphics and was a long detailed game.
It also was everywhere and wise, YouTube, on television commercials, internet banner ads, so they spent a grip. I would say at least 45 million on marketing.
So if prices raise, more money will go into marketing you can believe that. They want the game in as many houses as possible and believe marketing is the best way for that to happen.