Adventure D, called Espionage Island, can be used on the 48K Spectrum or 16K ZX-81. You must escape from an aircraft which is about to crash into the Atlantic. You must the reach the island safely, avoid capture, and try to discover the secret of the island. The game is more difficult than the others and many people have not managed to get out of the aircraft, even though there is a parachute. All the adventures cost £6.95.