A test ROM of Galaxian is a pre-release version of the game. Prototype versions often contain incomplete features, debugging tools, or different gameplay mechanics compared to the final product.  These versions offer a rare glimpse into the development process of a classic arcade game like Galaxian.  The differences between this test ROM and the final release version might include incomplete graphics, placeholder sounds, or different enemy behaviors.  Examining such prototypes can be valuable for understanding the evolution of game design.

Galaxian Test ROM

Galaxian Growing Galaxip / Galaxian Nave Creciente (Recreativos Franco S.A. Spanish version)