This is a version of Fantasy Zone, specifically identified as Revision A and unprotected. The "unprotected" tag suggests that this version lacks any copy protection mechanisms, which was common for some arcade games.  Revision A points towards a specific update or revision of the game's code, potentially including bug fixes, balance adjustments, or other minor modifications.  Gameplay remains consistent with the original Fantasy Zone, with its signature Opa-Opa spaceship and colorful landscapes.  Sega likely released the unprotected version for various purposes, such as testing or distribution to specific arcades.

Fantasy Zone (Rev A, unprotected)

Fantasy Land (set 1)