The copy on the back of the Terra Force inlay says:
Terra Man, the sole survivor of Earth's galactic fleet, must defend his home planet and the Moon against Ygothulu the planet devourer and his marauding hordes of Demon Bombers and Solar Pods. Can Terra Man stem the horrible onslaught...??
Terra Force was released in a standard cassette case. As with all of the original £2.50 budget releases, the cover featured a single screenshot from the game.