Have any of you gamers played Portal 2?

[Black Diamond Vol]

I've had it sitting on my shelf for months, but just picked it up and played for the first time this week.  It's the type of game that will definitely force you to think outside the box.  Some of the levels are incredibly complicated, but none are so tough that you can't figure them out on your own (after a long while).  And it's one of the funniest games I've ever played.  This game is like a puzzler, a platformer, and a shooter all rolled into one.  It should appeal to just about anyone.   

[ReVOLver]

I have not, but I have heard similar things.

I'm currently replaying D3 on Nightmare difficulty. After that is Hell difficulty and then Inferno. Then I could replay it with three other different characters, each on 4 difficulty levels. I'm guessing I will probably stop after Nightmare and play a different character or two.