All-or-nothing

It was all-or-nothing and we struck out spectacularly.

Going all out like this is going to propel me right into an all-or-nothing struggle.

It's not an all-or-nothing thing.

Ziri needs to eliminate that all-or-nothing thinking.

Near-synonyms: black-and-white, dichotomous, all-or-none

A crewed moonshot is an all-or-nothing affair: either they get to the moon and back alive, or they don't.