Rockstar has launched the final Grand Theft Auto IV trailer, subtitled "Good Lord, What Are You Doing? (a.k.a. Everyone's a Rat)." Check out the video above, and while you're at it, you can peep the game's three other trailers after the break. The trailer will also be available for download on PSN and Xbox Live.
And hey, don't forget to keep track of publisher Take-Two's family tree.