Valve released a trailer showcasing the upcoming Perpetual Testing DLC for Portal 2.

The trailer features a voiceover from JK Simmons as Cave Johnson explaining how it all works, and it is unsurprisingly hilarious, check out the trailer after the break:

The ‘Perpetual Testing Initiative,’ which brings user-created level editor functionality to the Mac and PC, PS3 and Xbox 360 gamers could eventually gain access to the DLC content.

The ‘Perpetual Testing Initiative’ DLC for Portal 2 will be available May 8, 2012, on PC and Mac.


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