GamePro - Valve's ongoing plan to dominate the PC gaming space through Steam has now officially expanded into the free-to-play model, which some people will recognize as a bit of misnomer; most free-to-play games involve much-maligned microtransactions, where the player pays for access to perks, benign or otherwise. What you actually get for free varies per title, but you can generally get a pretty good amount of content without whipping out your credit card.
How in gods name did Alien Swarm not make this list lol
Lol, this is one of the most dumbass lists I have ever seen lol.
There are 7 (!) free to play games on Steam and the only one they didn't mention was Alien Swarm.
This is so much fail I can't even...