CARD is the extension given to files used by Funkiball Adventure. It is a game developed by RealNetworks Inc. It is an arcade game where you break bricks with a paddle and a ball. Additionally, by completing the levels, the user travels around the world and recovers stolen works of art.

CARD is a file used to store game progress. The user can save at any time to continue the game at a later time from the place where he last left.