If you can’t play it, you can’t take it back. You’ve wasted the money. Four times we’ve had unplayable games we can do nothing with.
Gareth Garrett, via PC Gamer

Buying a game only to find out that you can’t play it is a real issue, easily solved by just letting people know what features are in a game. Without that, the work on those features may well go to waste.

Mentioning key accessibility features online also gets you extra search engine traffic, for example from people searching Google for colour-blind friendly games, and greater visibility of your efforts with the press. Including just a single bullet point on colourblind mode in their presskit resulted in Hue’s colourblind mode being picked up on and praised in around 20 reviews, bumping their metacritic score into the green.

A standardised symbol has been developed to indicate that accessibility information is present. Use of this will aid recognition.

Best practice example: Legacy of the Elder Star
Best practice example: Uncharted 4
Best practice example: Final Fantasy XV
Best practice example: Fate Tectonics
Best practice example: Subtitle & caption listings on Steam

Resource: Game accessibility symbol