Elevator Action, originally released in arcades in 1983 by Taito, is a classic action game where players control a secret agent infiltrating a high-rise building. Gameplay involves navigating a multi-level building, avoiding enemies and obstacles, while attempting to rescue hostages.  The game is known for its unique isometric perspective, tense atmosphere, and challenging gameplay.  The BA3, 4 PCB version 1.1 is one of several arcade revisions, likely indicating variations in hardware or software.  Taito's distinctive style is seen throughout; its simple yet effective visuals and challenging design are key reasons for its enduring popularity among retro gamers. 

Elevator Action (BA3, 4 PCB version, 1.1)

Eight Ball Action (Pac-Man conversion)