Published by OneSwitch.org.uk Friday, 4 December 2015 6:30 pm.
It's hard to keep up with the demand for One Handed Controllers, whilst trying to develop other things. Here's my recommendations for getting some off the shelf solutions for Playstation, Xbox and PC.
1. The HORI SRWC (Super Robot Wars Controller) is a very well made Playstation 2 controller. The D-pad is positioned for a left-handed thumb which might be a problem for some. SRWCs are fairly easy to track down on Yahoo Japan and Google (search for "スーパーロボット大戦コントローラ"), translate Japanese web-sites using Google Translate and use XE.com and JAA to purchase and export the items. You may have to pay import fees on top, so prepare for this in your costings. It should be easy to get a HORI SRWC for well under £100 in this way.
2. The DragonPlus RPG cloned "One Handed Controller" for PS2 (pictured top right) is readily available on eBay from the UK. If living outside the UK, use advanced search terms to search internationally. Go for the cheapest one you can find that is brand new (often around £80). These have d-pads for left and right handed thumbs. The build-quality is not as good as the HORI but these are still good controllers.
3. For both of the above Playstation 2 controllers you will need adapters to get them working on a PC or more modern game console. Firstly, you'll need to convert these Playstation 2 controllers to USB. I recommend picking up a "PS2 to Xbox 360" adapter from China on eBay (above left). This is a good adapter, with a little menu button on the case.
Use on a PS3, Xbox 360 or Xbox One can be achieved in a wide variety of ways. Simplest (but the most expensive) is using a XIM4 adapter from eBay with a micro USB link-up cable (if you have a PS4 you will this USB cable already). The XIM4 allows you to use the original controller (connected into port 3 using the link-up cable) and the One Handed Controller in port 2.
Alternatively, if you are happy to use a Windows PC as the brains of your controller linked to a console, then the Titan One offers huge possibilities for realtively easy reconfiguration of controls. You can optionally add in free software utilities such as JoyToKey and VAC Voice Activated Commands do all kinds of really powerful things to make play easier. Latching, auto-fire and speech controls all can be added with some patience and learning.
For people with very good soldering-iron and craft skills, Ben Heck below gives some fine advice on how to build your own controllers, often without the need for adapters.