Portal 2: Peer Review Arrives on October 4

Video game developer Valve has announced that the Peer Review content pack for Portal 2 will be launched on the Steam digital distribution service, the Xbox Live Microsoft service and the PlayStation Network on October 4.

The DLC will be free for all those who own the original game and will include a section which expands on the story told in the cooperative side of the campaign, with Atlas and P-Body against taking center stage.

The package will also include a challenge mode that has levels both for just one player and for cooperative play and comes with leaderboards for high score chasers.

Valve announced that new content will be launched for Portal 2 immediately after the launch of the game and initially talked about a summer launch date.

The company is notorious for keeping content in development longer than it initially states in order to make sure that the levels it releases are as polished as possible.

Those who own the Hydra motion tracking controllers created by Razer can also download a number of levels that have been made with the technology in mind.

Valve has already said that more levels are being created for Portal 2 and that players can expect to get them for free on all platforms.

Portal 2 is a mix between platformer and puzzle, picking up the story of Chell and GlaDOS from the first game and pushing it forward after an interval of a few hundred years.

The portal mechanics are very similar to those of the first game in the series but Valve has added modifiers like gels and more open areas to increase the complexity of the challenge the player has to face.

Given the success of Portal 2 Valve is probably already in the initial stages of creating a third title in the series, although an official announcements will probably only arrive at some point during 2012.