The Crystal CS4624/CS4630 Game Port driver is a software driver used for the Crystal Semiconductor CS4624 or CS4630 audio chips, which include support for a game port (also known as a joystick port). These audio chips were used in older sound cards, typically in systems from the late 1990s to early 2000s, and are associated with gaming peripherals like joysticks, gamepads, and light guns.

The game port is a legacy connector, and the driver is needed for the system to properly recognize and communicate with game controllers connected to the game port. Although the game port has largely been replaced by USB peripherals, some older devices or software might still require this driver.