Several sequels have been released for multiple consoles, which have expanded the original game's plot, adding characters opposing and supporting Snake, while there have also been a few prequels exploring the origins of Metal Gear and recurring characters. The third game in the series, "Metal Gear Solid" for the PlayStation, marked the beginning of a whole new line of 3D for "Metal Gear". , over copies of games in the franchise have been sold worldwide, with individual installments critically and commercially acclaimed and receiving several awards.