Half-Life 2 was a huge success, but it was only after
Portal was released when people saw the true genius of ValvE, but why didn't they combine the two great games? Well, someone did think about it and made it happen.
Many people agree
Portal is a really awesome game, but it's a shame you can't play it on multiplayer, now that would be really bad-ass. However, these guys made a video on how that would be like ... and it looks like lots of fun. Let's hope the guys at Valve see it as well.