Upgrade your stealth kill weapon.

Acquire the two-way radio.

Open every treasure chest.

Complete 'Nicholson Electroplating'.

Perform 10 effective counterattacks in a row without getting hit or parrying.

Find and inspect the prop spinner at the Nicholson blast site.

Raise Two to her maximum level (10).

Acquire your first melee weapon.

Complete Mission 3 - Echoes.

Acquire the rope.

Complete Mission 1 - Smooth Sailing.

Discovered a strange metal flower.