Portal 2 Sixense Perceptual Pack

Portal 2 Sixense Perceptual Pack is currently available on Steam. Launch it now* or buy it from Steam (via browser or Steam client).
*Only works if Steam has been installed, please install Steam if you haven't already.
Steam Deck support status: Unknown - More info on ProtonDB

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The Portal 2 Sixense Perceptual Pack is a DLC for Portal 2 which tries to put the Portal series into Virtual Reality, made for the Sixense Creative Senz3D hardware.

It comes with 20 unique maps, under the prefix sp_a*_sx_. The similarly-named Portal 2 Sixense MotionPack DLC, which some of the aforementioned 20 maps are from, bundles along six extra Co-Op maps, with the prefix mp_coop_sx_.

The main feature of the Perceptual Pack is how it uses the Creative Senz3D hardware to create unique mechanics otherwise normally impossible, such as moving Portals on their side. Likewise, the Motionpack does this using the Razer Hydra hardware.

Both the Perceptual Pack and the MotionPack were published by Sixense. The MotionPack was released in 2011, and was obtained via Steam keys supplied with all Razer Hydra purchases, while the Perceptual Pack was released in 2013, and is free on the Steam store.