Steam has a huge list of free to play games. Many of them are of the MMO variety, but hey, we with empty pockets can’t be picky. However, there are some totally free single player games that you can add to your Steam account for the price of zero. Click on the photos for more information about the games including their Steam links.
Like the one mentioned here, there are plenty of free games on Steam that aren’t MMOs. I will continue to bring them to you as I uncover them in my never-ending search for gaming on the cheap!