To answer some questions Charlie Brooker has been replying via twitter (yeah i follow CB on twitter)
Apparently they did try to get Yahtzee on but couldn't due to contractual/practical hurdles but CB added he is a fan of Yahtzee

He also added he reviewed shit games like wolfenstein and 50 cent cos they are "entertaining"
Apparently gamswipe outdid news and screenwipe in regards to ratings

he also Says if people want more gameswipe they should contact the BBC but he may add a games section to screenwipe in the future.
Charlie Brooker correspondent out!