Any device that allows people to control a computer or games console using separate disability standard plug-in switches (see picture above). Disabled people can then play many games using a variety of body movements, or even eye-blinks, where a traditional controller might be too difficult. Switch Interfaces are also known to some as adaptive, accessible or enabling technology.
As with all game controllers, one does not fit all, so you will need the right switch interface, and possibly an extra adapter to match up to your games machine.
The standard part is that they should be able to plug into specially made or adapted equipment via a 3.5mm headphone style socket.
The right playing set-up is often only discovered using a mix of personal research and trial and error. However, if I can help, I will.
Finding enjoyable and playable games is also a case of trial and error, as for anyone. Modern games are expensive, so try borrowing or hiring games first, or check your retailer's returns policy. Alternatively there's a wealth of cheap second hand games out there from eBay, boot sales and from retro traders.
Don't aim to high to start with, but equally, don't get bored with the same challenges. Take a look at Chris Addis's Using Switches and Switching Systems booklet, and Inclusive Technology's Switch Progression Road Map booklet for more ideas. See also the excellent SENICT and Linda Buckhart resources.
For further assistance, please e-mail: info@OneSwitch.org.uk