Chroma, Ubisoft’s colorblind simulation tool, is now available for public use after several years of internal use and development. With an estimated 300 million people around the world affected by colorblindness, Chroma allows developers to accurately replicate their experience and create accessible content to meet their needs. The open-source tool works by applying a filter over the game screen without hindering performance.
The input emulation system in Steam is also heavily affected by accessibility needs. A part of the system that isn’t really seen or talked about is how it is used for many non-standard input devices made for people with physical disabilities.
Newell (himself, afaik not within Valve) is also currently researching BCIs, with making devices for disabled people the biggest thing those are being used for currently.
I heard about the latter but never really thought about Steam Input like this, goes to show how easy it is to completely miss such stuff when you don’t need it. Also, in case someone’s confused BCI stands for Brain-Computer Interfaces.