Best Co-op online since Left 4 Dead 2. What started out as a small expirement like the first Portal, has become a major phenomenon. Great gameplay, characters, and overall one of the greatest and fun Co-op games of all time. Almost endless replayability, great soundtrack, and one of the most supported titles out there. I highly recommend you pick this up, or try it out to see what all the fuss is about. But to note as well, the game may be heavily dependent on your hardware, and may run slowly unless set to a lower resolution.

Best Co-op online since Left 4 Dead 2. What started out as a small expirement like the first Portal, has become a major phenomenon. Great gameplay, characters, and overall one of the greatest and fun Co-op games of all time. Almost endless replayability, great soundtrack, and one of the most supported titles out there. I highly recommend you pick this up, or try it out to see what all the fuss is about. But to note as well, the game may be heavily dependent on your hardware, and may run slowly unless set to a lower resolution.