Survive your first encounter with Stalkers

Get through the first Zero-G area

Collect all weapons, text logs and audio logs on Chapter 1: "Worlds Apart"

Get your first Suit

Complete Act 3 of the campaign

You discovered what Knox's Rule #3 is

Complete 1st & 10, Let’s Do It Again

Complete Act 2 of the campaign

Orders

Complete The Wrong Way

Destroy an enemy aircraft with an anti aircraft weapon

If in doubt, fall back

Short, controlled bursts