A family game that actually requires the participation of the player's pet dog.
I came across this game on BGG a couple of years ago. And up until recently, it was the only game I knew of that required the participation of a living creature other than a human.
I was beginning to think that it was the only such game. But I obviously forgot about the ingenuity (and/or perversity) of the Game Designing Human Mind.
In any case, it's the only game I know of that uses the Active participation of a Living creature other than a Human.
And then I stumbled upon this game on BGG a few weeks ago. I read the info provided in Hiroshi's article about the moth larvae living inside these beans.
My first thought about all this was that this is the only game where it is possible for a game component to hatch in the middle of gameplay.
And how would you adjudicate such a situation? Does your bean hatching mean Immediate Victory or Automatic Disqualification?!
So, this is the only game I know of that uses the Non-Active participation of a Living creature other than a Human.