100 would be way too much and justifying the price with inflation isnt working either, because it's not inflation you have to look at but real income.
If there's 5% inflation per year, but the but salaries only grew by 3.5% per year, then over the course of 25 years, people would lose around 30% purchasing power.
And if 100$ is what a 90s game would cost today, then 100$ - 100$ x 30% = 70$, the price we have right now.
These numbers are only an example, but the point should be clear. However, according to chatGPT, the US did experience a loss in purchasing power in the range of 30 to 40% since the 1990s.
Overall I can say, that 100$ would be a massive, unjustified price hike. It will not lead to growth. People will merely purchase less games with the same amount of money.
This will inevitably lead to some studios going bankrupt and will only accelerate the transition to "few big corps own everything"