Box prices for video games have been remarkably static. New games were selling for $60 in 1993, just like GTA V is today instead of the inflation-adjusted equivalent of $97.
1.) Assertions about what "would have been part of the core game" are certainly popular, but not necessarily true or provable and certainly not universally applicable.
2.) Standard new game price held steady at ~$60 through three console generations prior to common place DLC. If inflation had been taking its toll we'd have been looking at $85 games prior to "horse armor".
But besides, the movies and games it's being compared to are no older than 4 years, so I don't think it's a huge problem.
Yes, you can and do cause inflation by printing more money, but it's not as simple as you assert it to be, and it certainly doesn't warrant the rudeness to the parent.
Which part of the Billion Price Project's methodology do you disagree with? Its measure of inflation agrees with the BLS's pretty closely. http://bpp.mit.edu
Which measure of inflation do you prefer over those two, and where can we examine its methodology?