Zork I: The Great Underground Empire

1980 Marc Blank, Dave Lebling, Joel Berez, and Scott Cutler

"Zork I: The Great Underground Empire" is a 1980 adventure game developed by Marc Blank, Dave Lebling, Joel Berez, and Scott Cutler. This is release 5, the earliest version ever published for Apple II, published by Personal Software. It requires a 13-sector drive but otherwise runs on any Apple II with 48K.