Orca
GNOME's open assistive-technology client provides speech, braille, navigation, and scripting for accessible applications.
Why use it
Linux game tools, launchers, and web shells can use it to verify semantic focus and keyboard operation for assistive technology.
Where it fits
Use testing, performance, accessibility, and diagnostic tools to remove problems players will notice.
What to check
Applications must expose correct AT-SPI semantics, game rendering is usually not directly readable, and desktops, synthesizers, and distributions need testing.