The first chunk of Portal 2 DLC is now available for download on Xbox Live.
The DLC was announced at the end of last month.
Titled 'Peer Review', the extra content is free and will take up 1.37GB of space offering new challenges for players to solve as P-Body and Atlas, the stars of Portal 2's co-operative campaign.
GLaDOS will also be making an appearance. What would Portal be without GLaDOS after all?