Early PS5 DualSense Prototype Controller Discovered, Works On a PS3
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Andrew Borman on Twitter: "My PlayStation prototype controller. Post-Nintendo,but some conversations indicate it was used late as well #snescd http://t.co/MdS3kT3cYo" / Twitter
These PlayStation 4 controller prototypes may have been forged in the depths of hell - MSPoweruser
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The Evolution of the PlayStation Controller | Den of Geek
Evolution of the PlayStation 1 Controller Prototypes : r/retrogaming
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The Evolution of the PlayStation Controller | Den of Geek
This Is PlayStation 4's (Prototype) Controller - IGN
PlayStation 3 Boomerang Controller - Posts | Facebook