We are hitting the one year anniversary of this games release. It should be in much, MUCH better condition considering how long it's been out. From now on all Firaxis games are 'wait a few years' for me.
To be fair, it seems like a technical improvement over the first game that ran on idTech5. While STEM is made FROM idTech5, it seems that they've managed to improve it. Good to hear, since I liked Evil Within as a game.