Dead Space 3 is definitely trying some new things for the series. First, it was announced that the game would be co-op instead of single player and that drew a lot of attention. Now it has been revealed by Eurogamer that another change is coming. Although players will not be required to, there is now an option in the game to allow users to spend real money on their in-game items.
Yara Khoury, Associate Producer of Dead Space 3, said this:
"You can buy resources with real money, but scavenger bots can also give you the currency that you can use on the marketplace. So you don't have to spend [real world] dollars."
These resources are required for upgrading weapons. Crafting has been part of the game series from the beginning but certainly not in this method. It's good to see that spending money is still not required, but it is a change of pace. Companies are paying attention to changes in the market thanks to free to play games and this looks like an extension of the principle.
Finally, although you can pay your way past some upgrades, the system will not allow you to simply buy the best weapons outright. Those are still going to be locked until you are far enough in the game to gain access to them. So, it's not as if this implementation of microtransactions is "pay to win", but it still may be viewed as too close for some Dead Space fans.