..it’s only available if you purchase Razer’s Hydra controller. Rather, make that Razer’s USD$140 Hydra controller.
The motion-sensing device is available via Steam for US consumers now and comes with a copy of Portal 2 plus the “Sixense MotionPack,” which adds 10 new single-player levels to the first-person puzzler.
“Play Portal 2 like never before with the detailed object manipulation only available with the Razer Hydra,” Valve tries to convince.
The new levels releasing later for everyone else looks pretty slim, too; the new maps “can only be solved with true six degree-of-freedom.”
For a bunch of images of the new levels, hit the DLC’s Steam page here.