Protestants believe you need to have faith in Christ to be saved, and that will lead you to wanting to do good works. They're basically Catholics, but without the church institutions being central to salvation.

For Catholics and many other churches, you need to be baptised to be saved. For Catholicism specifically, this is done by your parents while a child, but it is also required for converts to be saved.

Born again Christians require a profession of faith and repentence. That's not a high bar there, but it's still a thing you need to do.

Calvinists believe in predestination, meaning your salvation is already determined, believe that those who will be saved will demonstrate certain behaviours, thus encouraging people to do things to convince themselves they're part of that elite group.

So generally speaking, Christians believe you need to do something to be saved.