The Battle Platform was a portable G.I.Joe Headquarters, not unlike an oil rig. It featured adjustable legs, a platform to land small vehicles like the Sky Hawk, a working crane, missile launcher (that didn't fire), a collapsable bridge so small vehicles could come aboard, and a computer hub.
The T.T.B.F. didn't include any figures, but did include several accessories, sticker sheet, and instructions/blueprints for assembly, which was required.