Okay, so Half-Life 3 probably isn't going to come out at any second. But now is still a good time to catch up on one of the most beloved series in gaming.

And if you haven't played the Portal or Left 4 Dead series yet and you have two eyes and two hands, there's something wrong with you.

Luckily Gamefly is offering the Valve Portal, Portal 2, Left 4 Dead, Left 4 Dead 2, Half-Life 2, and Counter-Strike: Source at 33 percent off for a limited time.

So grab some of these great games and see what all the fuss is about. Leave a comment below or on Twitter.