unwinnable

adj

1. (not-comparable)Unable to be won.

   “The “Zarfian Cruelty Scale” rates games as Merciful, Polite, Tough, Nasty, or Cruel. The scale describes how works of IF become unwinnable, especially how and when the interactor (here a player, and one trying to win) learns this.”

   “This does mitigate the problem of the game playing itself, but it doesn't change the fact that at higher levels a lot of the games are either unwinnable or unloseable depending on the luck of "obey" or "disobey".”