Gaplus, released by Tecfri, is a vertically scrolling shooter in the style of Galaxian. Gameplay involves piloting a ship to destroy waves of enemy spaceships and bosses.  It's considered a classic arcade game, known for its challenging gameplay and distinctive visual style.  This specific version, noted as '(Tecfri PCB)', refers to the printed circuit board manufactured by Tecfri, indicating a specific hardware configuration for the game.

Gaplus (Tecfri PCB)

Gaplus (GP2 rev D, alternate hardware)