0 used to say that something will come to an end, and in a way that is unsatisfactory or unsuccessful: --
If this finance doesn't come from somewhere, then it's game over.
It will be game over for human civilizations if we let global temperatures get out of control.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Vi kan slutföra det steg för steg hur lång vägen än är och den kan inte slutföras hur kort vägen än är om du inte ens markerar ditt fotavtryck.