A number of images of an alleged iPhone controller from Razer have leaked online.
The images, tweeted by @evleaks, are said to show a prototype controller dubbed the Razer Kazuyo.
The case appears to wrap around an iPhone, offering a D-Pad, four fire buttons and two shoulder buttons.
There also seems to be a separate section, featuring a power button and speakers, which the phone attaches to and can be tilted upwards on a hinge to a 45 degree angle.
Evleaks also claims the buttons are backlit and that the face buttons are pressure-sensitive.
When Apple launched iOS 7 in June, support for third-party gaming controllers was added to the operating system.
A subsequently leaked image suggested Logitech was working on a compatible controller.
Earlier this year, Razer released its own gaming tablet, dubbed the Razer Edge, with prices starting at $999.