That's just how it goes. Steel Battalion also didn't work without the controller and it was released. I'm sure there's more, like Skylanders.
Everything should be released even if it cannot be played by 99% of people 
Maybe someone can now play this backup and keep his original copy sealed or whatever, or you might acquire a portal but not the game somehow.
Likot Mosuskekim, Woodcutter cancels Sleep: Interrupted by Elephant.
