I have looked at a Nazi Zombies review on youtube and I have noticed the conventions are different to print reviews. There is voice overs the game play, its very informal the person reviewing Nazi Zombies is just explaining the game and how its played whilst playing split screen with a friend. He explains his opinion on the game as well as pros and cons. He mentions the star rating and platform information. There is no music in this review you can just hear the games sounds for example gun shots and explosions, I think this is to give you a real preview of the game.
