It is, of course, only a year since the first Left4Dead, with the swiftness of the sequelโ€�s arrival causing consternation in the gameโ€�s vocal online fan base. However, allegations of a cynical rush to market prove to be utterly unfounded. With a focus on online and co-operative play above storyline, the original was more of an online zombie-loversโ€� playground compared to a balanced conventional game, and as such lent itself well to a swiftly conceived sequel from legendary developer Valve.