Facing severe problems with selling interactive fiction to the widening gaming masses, Infocom made the fatal mistake of not soldiering on and succumbing to the supposed market pressures of graphics. Hence the failed but interesting and nowadays rare Fooblitzky. It was lavishly boxed board/strategy game for 2-4 players, that used the computer as a cross between a referee and a rather impressive accessory. The game as you most probably know flopped, meaning it usually costs quite a bit to grab in our day and age.
You can still try your luck on this Fooblitzky (Atari XL/XE) auction and hope for a decent price. The game comes in its complete (lavish too) box, including everything from the original disk and manuals to boards and markers. Everything seems to be in fantastic condition. Seller ships to N. & S. America and Europe.