The Teleplay Modem is an unreleased modem prototype for the Nintendo Entertainment System (NES) created by Keith Rupp and Nolan Bushnell, designed to eventually provide online play between NES, Sega Genesis, and Super Nintendo Entertainment System.

The first prototype, called the Ayota Modem, has a maximum speed of only 300 bit/s, too slow to render fullscreen NES quality graphics typical of an action game.

[citation needed] Bushnell later dropped out of the project, and Keith Rupp founded the company Baton Technologies.

He conceived the idea of allowing cross-platform play between compatibly designed games for Nintendo and Sega systems.

Although well funded by Viacom, Catapult failed to receive sufficient developer and gamer backing, folding in early 1997.