The Portal 2 Test Chamber editor DLC is now available, fire up Steam and you’ll be able to update it right away. The DLC also contains new Cave Johnson dialog, as seen in the video above.
By all accounts, the editor is supremely easy (and yet powerful) and integrates slickly into the main game itself, with chambers testable without any faffing at all.
User created ones are already available, barely minutes after the DLC was pushed live.
It was previously stated that the PS3 at least would be able to play levels created by users in this fashion, although that’s all gone quiet since the initial news.