It won't challenge GTA IV. It's too blasé and obvious for that. Y'know, like GTA used to be. There's not an ounce of subtlety in its whole virus-riddled body. Think about this as you cling onto the Empire State Building. Continue to hold onto the idea as you launch away and glide over to Times Square. Keep pondering the subject as you hurl to the ground like a missile, shattering benches, bones and Black Ops as you land. Go over the idea one last time as you crawl into a ball before launching out one hundred tendrils that explode every car, man and helicopter they touch.
Then walk away calmly and do it all over again as the old lady you're about to eat. You know what? Subtle ain't all it's cracked up to be.