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The Mantis mission is an optional side quest in Starfield that offers players a complimentary set of Legendary armor along with a starship as a reward. However, the challenge lies in the fact that the mission's location remains undisclosed unless players stumble upon an encrypted note. This guide aims to assist space explorers in starting the Mantis side quest, unraveling its perplexing letter puzzle, and swiftly acquiring its loots: The Mantis spacesuit and the Razorleaf ship.

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How to Start the Mantis Side Quest

image showing the record that starts the mantis side quest in starfield.

To initiate the Mantis quest in Starfield, players will need to read the “Secret Outpost” note. The letter hints at a hideout on Denebola I-b, referring to it as a lifetime opportunity. Upon obtaining this letter, a new mission named "Mantis" will be added to players' logs, allowing them to mark it on the map.

Players are likelier to find the Mantis mission note during the Groundpounder mission.

How to Solve the Mantis Floor Puzzle

image showing the mantis corridor puzzle solution, the code is tyrannis.

There’s a booby-trapped corridor in the Liar of the Mantis that players can only pass through if they know the password. To solve this puzzle, players must step on the pressure plates in the correct order to spell out the word "TYRANNIS." It is important to be precise, as any misspelling of the code will activate turrets and instantly kill the player.

Puzzle Location: Denebola I-b, Secret Outpost Waypoint.

Password: TYRANNIS.

How to Solve: Spell the password with pressure plates.

The Complete Mantis Quest Walkthrough

image showing the legendary razorleaf ship in starfield.

To get the free Razorleaf starship and Legendary Mantis spacesuit, players will need to complete the Mantis side quest. The quest requires players to travel to Denebola I-b and loot a hidden hideout on the planet. Here’s a step-by-step guide to doing so.

Retrieve the Secret Outpost Note From Spacers

image showing the secret outpost note in starfield which is required for the mantis mission.

The Mantis side quest starts after players find a text log called the “Secret Outpost.” To get this note, they must loot Spacers ​(Spacers are interstellar criminals that can be found in most star systems and are hostile toward players). Note that simply grabbing the letter won’t unlock the mission, and players will need to interact with it in their inventory.

Travel to the Denebola Star System

image showing the denebola i-b planet in starfield.

After unlocking the Mantis mission, head to the Starmap and fast-travel to the Denebola star system. From here, land on the “Secret Outpost Waypoint” on planet Denebola I-b and locate Liar of the Mantis. The path to this hideout is revealed once players activate their scanners.

Solve the Pressure Plate Puzzle

image showing the pressure plate puzzle in the lair of mantis in starfield.

Once players have successfully cleared out the enemies in the Liar of the Mantis, their next objective is to find the secret corridor guarded by Livvey. Inside this corridor, they will encounter a series of pressure plates, each bearing white letters. These plates are part of the Mantis puzzle, which grants access to a legendary prize.

To crack this puzzle, players must input the code “TYRANNIS.” They can obtain this passkey by listening to an audio log named “Leon Voclain - Sic Semper Tyrannis.”

Activate the Razorleaf Spaceship

image showing how to get the razorleaf ship in starfield.

As a reward for completing the Mantis quest, players have the opportunity to obtain a complimentary spaceship known as Razorleaf. To acquire the Razorleaf ship, players must first locate the activation key within the basement of the Liar of Mantis. Once the key is pressed, they should proceed to the top floor using the elevator and enter the cockpit of the ship to claim it as their own.

When boarding this ship, new interactions will occur during docking and hailing with other spacecraft. For example, certain security guards will offer Credits in return for players sparing their lives, as they mistakenly believe that the actual Mantis is the one piloting the ship.

Get the Legendary Mirrored Mantis Suit

image showing the legendary mantis armor.

The Mantis spacesuit is in the laboratory of the Secret Hideout on planet Denebola I-b. To get it, players will first need to activate the Mantis spaceship and then retrieve the suit from the protective enclosure.

The armor comes with multiple perks, such as the ones listed below:

  • Mirrored Mantis Spacesuit: -15% incoming melee damage, 50% less weapon weight, 4% likelier to reflect attacks.
  • Repulsing Mantis Pack: -15% incoming melee damage, 20% extra carry capacity, 5% chance to disarm nearby attackers.
  • Sensor-Chipped Mantis Space Helmet: -15% damage from Humans, +25 thermal resistance, 20% extra accuracy for shooting on the move.

Each player might get a different set of modifications on their Mantis spacesuit (though these are the most common ones).

Starfield is available now for Windows 10/11 and Xbox Series X|S.