Ercham
A man who lost his right arm in a motorcycle accident has built his own custom one-handed gaming controller and plans to launch a Kickstarter to help fund production of the device.
The device’s creator explained how they “built my own solution,” called Ercham, after struggling with standard keyboard and mouse setups, developing a single device that combined both inputs into one unit designed for one-handed use.
Custom controller evolved from modified keypad and mouse setup
Joe has subsequently shared details of the build process both on the device’s website and on various subreddits to increase exposure, outlining how they first experimented with a Razer Tartarus as a base.
They modified the controls, attached a mouse to the side, remapped inputs, and added a strap to create a functional one-handed setup.
They said that initial version allowed them to “move, aim, click, shoot, and use abilities again,” proving the concept worked despite its rough design.
From there, they developed a more refined device from scratch, keeping a similar layout but rebuilding it into a single housing. The updated controller included an integrated mouse sensor, full keybind access, a hand strap, and additional inputs, with a focus on reducing hand movement and supporting longer sessions.
The creator said the controller was being developed with custom firmware and was intended to function as a plug-and-play device, avoiding third-party software that could cause issues with anti-cheat systems.
They also confirmed the controller was in production and planned for wider availability, with progress updates continuing to be shared through the Ercham project page.
“I’d love to get this made for kids with physical limitations and disabled gamers who need better options,” they said.
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Anyone wishing to support the project can do so through a GoFundMe to “Help make one-handed gaming real.”
