Airball, in its prototype versions (Proto1 and Proto2), represents early stages of development. Information on these prototypes is scarce, so details on gameplay or the company behind them remain mostly unknown.   Differences between Proto1 and Proto2 likely indicate adjustments or experimental mechanics that were changed before the game's official release (if it even was fully released).  These prototypes offer a valuable glimpse into the design evolution before the final product.

Airball (Proto1)

Air Fortress (Japan)