A compilation of 6 games for a ZX81 with a 16K memory expansion module. Lunar Landing The lunar excursion module starts in a atable lunar orbit. You can control it to bring it a soft landing on the moon. Twenty One The card game of Twenty One Combat You are in a spacecraft equiped with 12 missiles with which you have to fight of aliens. Substrike Within a grid you have to fight of submarines using depth charges. Codebreaker A Mastermind like game Mayday You have to find a person lost in space (7x7x7 grid).