Sony Interactive Entertainment dabbled with mobile gaming several years ago. The now-defunct PlayStation Mobile storefront was available for a handful of years in the early 2010s. However, after shutting it down back in 2015, we haven't heard much about SIE's mobile endeavor since - until now.
According to VGC, the Japanese division of Sony just released a patent describing a system that would let gamers play games on a device with two controller handles. What's interesting here is that the design doesn't look anything like the new DualSense. Instead, the controller is more akin to the older DualShock 4's design, with a "left side grip part and a right side grip part gripped by the left and right hands of the user." The patent then goes on to include a drawing with the description of a "shaft part which can be tilted by the user and detect the tilt direction and the amount of tilt of the shaft part."
Is Sony working on a PlayStation mobile controller?

