Published by OneSwitch.org.uk Sunday, 25 June 2006 1:03 am.
Brilliant Computing were creating accessible video games as far back as 1988. They wrote a small number of games that featured two very important features: Compatibility with a wide range of accessible controllers and control over the speed of the game.
There is more on this in my Accessible Gaming Pioneers page. If anyone knows of anything I have missed out, please get in touch.