What do you think is critical?

[ArmySGT.]

What do you think is critical for a Morrow Project adventure?

What is the right setting?
What is the mix of NPCs?
How much do you tailor the setting to the story?
Is it necessary to introduce new equipment or encounter groups?
Is it necessary for the scenario to be on the grand scale?
Do you let the PCs make the alliances or groups or steer them toward one planned?

How do you steer the PCs where you want them to go?