Pleiads is an arcade game with a strong emphasis on shooting. The game's specifics, such as its developer, release date, and detailed gameplay, would require further investigation.  The existence of Spanish and different version sets suggests potential regional variations or updates to the game's content, which points to it likely having seen at least some degree of popularity or regional appeal in arcades. More research into arcade game databases will be needed to fully uncover the game's history and background.

Pleiads (Tehkan)

Pleiads (Irecsa)