Option Units are featured in many mecha anime and videogame series. They are self-propelled weapon units deployed by another vessel. In the case of the Gradius video games, the playable ships can summon Options with power capsules. The Options fire all the same weapons as the ship that deploys them, essentially turning one ship's worth of weapons into a devastating force. The Options themselves are indestructible; however, when the main ship is destroyed, so are its Options.