Scenario: #3 - The Final Intersection
Caution: This achievement has 3 required actions you must have done beforehand in the previous 2 scenarios in this episode. If you miss any of them, you will have to replay Episodes 1-3 in this section later on (you must complete scenario 3 before being able to replay 1-3. Do not attempt this right after you realize you missed something. You must first finish the scenario in able to replay it).
Gerry's Flare (Scenario 1): After talking Yoder out of his rage, as Gerry, look above the lockers that are in front of him and grab the flares.
Nima's Flare (Scenario 2): While doing the button sequences, Nima will be thrown a flare and toss it in a vent. As she runs from that location, there is a flare on the ground and you are prompted to press . Make sure she grabs this.
Yoder's Flare (Scenario 2): After using a shovel against a dinosaur in the vent, Yoder will be running. Again, there will be some focus on a flare and as he runs by it make sure you press when prompted.
In Scenario 3:
When you get to the intersections, go right the first time and left the second time.
When at the blueprints, pull up the dialogue menu and and pick "Survey the corridor".
Press to switch to Nima. Press to use flare #1. Interact with the buttons.
Press to switch to Yoder. Press to use flare #2. Interact with the buttons.
Press to switch to Gerry. Press to use flare #3. Interact with the buttons.