Seastalker Trivia (Apple II)
Seastalker was beta-tested by a 6th grade class in Erving, Massachusetts; the class which included future indie RPG designer Jared A. Sorensen.
Sea Stalker slightly broke away from Infocom's all text standard, by featuring a radar screen on the sub that would be displayed at the top of the screen while the game text would be windowed at the bottom.
Try typing in "kick me", and the game will respond "That sounds like a sign you could wear on your back."
Seastalker was the last Infocom game to be released in a folio edition.