The problem is...sure...15$ game will get bigger attention at launch. But you know what will get even bigger one? 10$ game. And you will likely reach even bigger audience with 5$. And imagine how much audience you can gain if you lower to 1$. And then we end up with another App Store diseaster.
Right, so the question is: What's the optimal price, taking into consideration both:
1) The price path over time, including when to discount and by how much
2) The initial price, taking into account the attention the game will get and how much or little word of mouth your game can build given its initial sales
It's a very tough question. My point of contention with this thread in general is that it's very, very hard and game-specific, *and* it depends on a multitude of constantly changing factors -- I don't think there should be a closed, "Indie games should be cheaper" answer.
Does it have a chance of hitting it out of the park with streaming? Will it build natural word of mouth and keep selling as people adopt a new platform? Is it likely to be front-loaded and requiring a massive number of initial players, perhaps due to its online mode? Are the server-side costs particularly large, requiring the dev to mitigate said costs on the price? Is it a good idea to commit to not discounting for an X amount of months to avoid customers waiting for a lower price? How important is the competition with other games releasing during the same period? Should you consider delaying and/or bringing forward your game's release depending on what else is coming out, rather than adjusting the price? Is a PS+ discount worth going after? How about a full PS+ release?
If anything, I would argue that the variety, massive differences in scope, graphics, fanbases, and presentation should be increasing the
variance of the prices. I expect to see more and more $20, $25, $30 and more indie games, as well as more and more lower priced ones, or games with faster/steeper discounts.
Physical copies, Kickstarter, differentiated versions, Early Access and more are all impacting the distribution of prices. As the market becomes more varied, so are the prices, and it's as it should be for profit maximization.