Look, just as the game before it, Portal 2 holds a place in my heart. Being one of my first games as well, one of the first lets plays of a game I really got into people watching on You tube (besides Minecraft), and one of the first gaming worlds that I really "nerded out" with. I love this game, and I could spend a whole essay on why I love it, all the improvements, changes, depth, story, gameplay, characters, all of it. But I would rather the game speak for itself. I know there is most likely not a lot of people out there who haven't played it, but if you are among those who have yet to experience the brilliance of Portal 2, give it a shot; you have my 100% recommendation, if that means anything.