Abstract:
A game system in which clock signals of devices can be synchronized with each other. A game machine, a game data delivery device, an image data delivery system, and computer-usable information are also disclosed. A game data delivery device (100) generates a reference clock serving as a reference for synchronization by means of an internal clock generating section (180), a clock selecting section (160), and a clock generating section (120), superimposes the reference clock on game data by means of a clock/data superimposing section (170), and thereby delivers the resultant as delivery data to a game machine (200). The game machine (200) extracts the reference clock by means of a clock/data separating section (272) and generates operating clocks on the basis of the reference clock by means of a clock generating section (220) for game executing means such as a game data reproducing section (290).