What should I take into account if I want to create a survival game?

Godot Version

Godot Engine v4.1

Question

Together with some colleagues we want to create an adventure and survival video game, but we are not sure what we should take into account in the development of the video game, we already know that we must create an environment and some scripts for the logic, in addition to the NPC AI and an inventory.

So, what should we do?