As you may or may not know, I wasn’t exactly pleased with Portal 2′s first DLC outing – “Peer Review“. While the Challenge Mode added much-needed replay value to the game, it really should have been in the game from launch. The only other bit of content in there, the new ”Art Therapy” co-op course, was rather disappointing, with poor writing and plot, as well as some meager and poorly balanced gameplay offerings.

I don’t subscribe to the school of thought that all free DLC is automatically good – you have to draw the line somewhere. And solid feedback will help make future releases better. For instance, the poor reactions to L4D1′s underwhelming ”Crash Course” almost certainly helped Valve build better L4D DLC in the form of L4D2′s “The Passing” (although later on they did let us down again with “The Sacrifice“). So we needn’t be afraid to voice our opinions.

But enough about all that. Here we are, with Portal 2′s second, and perhaps final DLC release almost upon us. The Perpetual Testing Initiative promises to turn Portal 2 into a never-ending house of pure science, providing it with enough replayability and content to feed 5 full-priced Call of Duty games. But does it fulfill that promise?