Very few, and only to a limited degree. Right now, a lot of games provide partial accessibility for deaf players by including on-screen captions -- although ma

Very few, and only to a limited degree. Right now, a lot of games provide partial accessibility for deaf players by including on-screen captions -- although many of them have insufficient captions for sound effects -- and some games provide accessibility for the colorblind with alternate color schemes or filters. That's about the full extent of accessibility support, AFAIK. Accessibility for the blind is basically not even on the roadmap. Some games are barely playable by blind gamers (e.g. https://www.polygon.com/2016/1/4/10707692/blind-gamer-beats-ocarina-of-time-video-legend-of-zelda https://www.polygon.com/2016/1/4/10707692/blind-gamer-beats-...), but that's much more by accident than design.