Mission: The Third Key

The Third Key is a main mission.

This mission is part of the Somber Marsh plotline.
 * 1)  Road to the Marsh
 * 2)  The First Key
 * 3)  The Second Key
 * 4)  The Exhaust Fan
 * 5)  The Third Key

Overview
The player must have completed  The Exhaust Fan.

Warning: Aadit disappears from the game after the completion of this mission and does not return. If the player wishes to befriend or romance him, they must do so before completing this mission.

Conduct of the mission
After completing The Exhaust Fan and waiting a few days for the gas to dissipate, Ursula summons the player via mail. Opening the mail immediately accepts the mission.

Head for the Entrance
Ursula, Arlo, Remington, Ten, and Ryder are waiting outside the ruin.

Choosing the first option immediately moves the player to the ruin.
 * Let's do it!
 * On second thought...

Explore the Ruin
Inside the ruin are several Sentinels, Shield Sentries, Sentidog T-52s, The Watchmen, and Patrolcraft T-21s.

Exploring the ruins lead to a broken door.

Repair Door
The following materials are needed to complete this mission:

Copper Wires can be obtained from a Sentidog T-45 that spawns behind the player.

Upon fixing the door:

Continue Exploration
Continuing with the exploration, the group finds a control panel that opens the door to the basement level.

In the same room, a treasure chest containing a Small Dagger can be found. Another treasure chest can be found in the circular room with the now-opened door, containing a Magnetic Bracelet.

A room containing a one-use med-kit and a treasure chest containing the Red Hawk (Book) can be found by turning right in the hallway room.

Finally, the group reaches the bridge room:

Repair Control Unit
The following materials are needed to complete this mission:

Silicon Chipsets can be obtained from the AI machines.

Upon repairing the control unit:

Continue Exploration
The group continues with the exploration and reach the final room with the last key.

The ruin's computer system recognizes the intruders and releases an AI machine, the Piggy-bot 042.

Defeat the AI Pig
The group must defeat the Piggy-bot 042 to continue.

Upon defeating the AI machine:

The group exits the ruins. With the final key activated, the entrance to a ruin in the Somber Marsh is revealed.

Post-conduct
Aadit leaves Portia after initiating  The All Source AI, which is accepted automatically. Thus, completing this mission marks the final appearance of Aadit in the current game version as of Final 2.0.1.

Tody is released from imprisonment and can be re-interacted with.

The Somber Marsh Abandoned Ruins entrance is accessible after The Third Key. This Abandoned Ruins houses the exclusive Titanium Ore and new sets of relics. Additionally, the final Dee-Dee Stop can be placed in the Somber Marsh.