Witty, innovative gameplay, and great comic art. It's a shame they couldn't finish the trilogy.

I've played more hours in TF2 than all of my other Steam games combined. If that's not a recommendation, I don't know what is. Now that it's free to play, you have no excuse for not playing it (well, other than "my computer sucks", I guess).

Now that a lot (probably not all of) the bugs have been ironed out, New Vegas is definitely worth picking up. The freedom you have in developing your character and all your... er... his or her... personality quirks is amazing. You can finally be the all-out jerk you've always wanted to be, and damn the consequences! Or you can play the goody-two-shoes and save the day.