Using a handheld system, and a custom motion sensor, players enter a digital world infested with pixel-artwork zombies (a homage to classic 8-bit console video games). A far more highly developed device, centered on a bicycle pump, was developed by Geddings Osbon, a Pentecostal preacher, in the seventies. In 1982, he received Fda acceptance to marketplace the merchandise as the ErecAid®.