As transforming giant robots beget movies about them fighting to save the world, so such movies beget us big summer videogames. And it doesn't get much bigger than robots that can change into things like lorries and fighter jets such as the Autobots and the Decepticons, does it?

In this case, Activision has learned that gamers want a little more than just re-treading the events of the movie. So, they've turned out a game that serves as a prequel to the film, pitting Autobot against Decepticon in the ultimate Transformer battle!

New to the series is a third robot form that bridges the gap between two-legged mechanoid and the vehicles they famously become. This hybrid form combines the muscle and firepower of robot form with the agility and speed of vehicle form for the best possible fighting combination!

The action is spread across seven different chapters, each starring a different Transformer, switching between Autobot and Decepticon characters. Different characters have different weapons and abilities at there disposal to keep things interesting. Megatron, for example, can sap the life out of any Autobots that get in his way, while Mirage has a sniper rifle and a cloaking ability.

You also get the added bonus of being able to throw down online in multiplayer mode!