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Faction Starfleet.png The Doomsday Device
B'rel landed.png
Given by:
Preceded by:
“Secret Orders”
Story Arc:
Klingon War
February 2, 2010
2400 Expertise icon.png
You will receive the following reward:
Choose one of the following
  • [Human Tactical Officer Candidate]
  • [Bolian Science Officer Candidate]
  • [Alien Engineering Officer Candidate]
Plus one of the following:

In The Doomsday Device, the player infiltrates a Klingon operation that threatens every world in the Federation.


After commandeering the B'rel Bird-of-Prey I.K.S. Targ, the player learns of B'vat's plan to unleash the Doomsday Machine on Federation worlds. Having confronted B'vat on Imaga, Starfleet is able to disable the Doomsday Device after an ultimate sacrifice by K'Valk.


Mission Text[]

Starfleet believed that the Klingons were testing their new weapons in the Imaga system.

We have information that now leads me to believe that these testing programs are for something much bigger than a new kind of torpedo.

Starfleet Intelligence has recieved a message from someone claiming to serve in Ambassador B'vat's personal force. This source says that the ambassador's research is complete, and that he is planning on using some sort of a doomsday weapon on Federation worlds.

My aide, Lieutenant VanZyl, will join you for this mission. Go with her to the Donia system. B'vat has a small supply base near one of the outer planets. Our source, a man named K'Valk, says that we will find the information we need to stop B'vat there.


Go to the Donia System, which is located in the Risa Sector of the Beta Quadrant, and find K'Valk.


  • Catch and Release
  • Boarding Party
    • Go To I.K.S. Targ
    • Secure the Engineering Deck
    • Go to the Turbolift
    • Secure the Bridge
    • Access the Ship's Log
    • Go to the Brig
    • Speak to K'Valk


    • Open Cell
    • Speak to K'Valk
    • Return to the Bridge
    • Contact Starfleet
    • Warp to Imaga
  • Silent Running
    • Go To Imaga System
    • Scan Generator Alpha
    • Disable the Energy Drain Field
      • Generator Alpha
      • Generator Bravo
      • Generator Charlie
    • Land on Imaga
  • In Plain Sight
    • Go To Imaga Planet Surface
    • Speak to K'Valk
    • Temporal objective.png Investigate Temporal Probe (Temporal Agent)
    • Shut Down Energy Drain Field
      • Locate Console Alpha
      • Locate Console Beta
      • Speak to Guard Commander
      • Use Console Alpha
      • Use Console Beta
    • Return to Ship
    • Speak to B'Vat
    • Survive B'Vat's Ambush
    • Board the Targ

Typical starship weapons cannot penetrate the Doomsday Machine's pure neutronium hull.

  • Doomsday Machine
    • Go To Imaga System
    • Go to Nav Marker
    • Run Long Range Scan
    • Destroy the Doomsday Machine by Firing Harg'Peng Torpedoes Into Its Maw
  • Hail Starfleet to Report







NPC starships[]


Icon Name Description How to Get Points
Broken Wing icon.png Broken Wing Completed the Science Option while playing The Doomsday Device. Be or be teamed with a Science officer and complete the Science objective (*NO LONGER AVAILABLE*) 10
Can Anyone Read Klingon icon.png Can Anyone Read Klingon? Completed the Engineering Option while playing The Doomsday Device. Be or be teamed with an Engineering officer and complete the Engineering objective (*NO LONGER AVAILABLE*) 10
Cloak and Bat'leth icon.png Cloak and Bat'leth Completed the Tactical Option while playing The Doomsday Device. Be or be teamed with a Tactical officer and complete the Tactical objective (*NO LONGER AVAILABLE*) 10
Dressed to Kill icon.png Dressed to Kill You have to use a holo-emitter to infiltrate a Klingon stronghold. 10
Looking into the Mouth of the Beast icon.png Looking into the Mouth of the Beast Destroy the Doomsday Machine 10
Ultimate Doom icon.png Ultimate Doom Destroy the 5 Man Doomsday Machine. Complete mission with full team 50
Leading Edge Explosives icon.png Leading Edge Explosives Collect Hargh'peng Torpedos *NO LONGER AVAILABLE* 10


For a walkthrough of this mission, visit the Walkthrough page.

Mission Replay[]

This mission is repeatable through Mission Replay, although the Rewards for completing might be reduced. Items scale to a player appropriate level (Scaling Rewards), as followed:

Level Rank SP Exp Mark <>
17–19 Lt. Commander 1158 675 IV
20–29 Commander 1552 1338 VI
30–39 Captain 1743 1878 VIII
40–49 Rear Admiral 1935 1856 X
50–60 Admiral 1935 2148 XI



  • This mission is heavily influenced by the original series episode "The Doomsday Machine", in which the U.S.S. Enterprise encounters a weapon of the same design.
  • K'Valk say that one of the two consoles is guarded by a Klingon who's willing to negotiate and the other guard prefers to fight. Despite this, both guards can be convinced to leave their stations if the player has a high enough Diplomacy level; without which both will attack the player.
  • Until the release of Season 11, this mission marked one of the only in-universe mentions of the Temporal Cold War in the game, specifically referencing the Na'kuhl faction featured in the Star Trek: Enterprise two-part episode "Storm Front".
  • This mission is the first in the game where you fly a ship other than your own, and had a long-standing bug that fails to re-enable some of your traits at the end of the mission. This was partly resolved in Season 15 but still occurs on some characters.


An updated cutscene from Season 15

"The Doomsday Device" was heavily remastered in May of 2011. Additions included an new introduction with the boarding of the I.K.S. Targ, cutscenes, several accolades and many new gameplay mechanics.

The remastered version originally created a continuity error, as it featured B'vat despite his character having been killed off in “Past Imperfect”. This was addressed in Season 5: Call to Arms, which restored the Klingon Front missions to the original (pre-launch) order.

The mission was reworked once more in Season 15, with the removal of the career-specific objectives while repairing the Targ, fixing the map display from the first portion of the mission and working on the trait reset bug. A later update in Season 15, on January 10, 2019, the cutscenes were updated with improved animations.

v · d · e
Storyline Missions      
All Starfleet Factions Starfleet-only
Tutorial DSC Starfleet only “Graduation Day”“Routine Maneuvers”“Trial by Fire”“The Shadow Knows”“Children of War”“Reporting In”
TOS Starfleet only “I Sing of Arms”“Search and Rescue”“Bull by the Horns”“Dislodging Klingons”“The Taurean Affair”“Earthward Bound”
25th century Starfleet only “Graduation Day”“Training Cruise”“Field Promotions”“Communication Breakdown”“Assimilation of the Innocent”
Agents of Yesterday TOS Starfleet only “Explore Earth Spacedock”“In the Shadow of Cestus”“Painful Omens”“Return to Babel”“Tangled Webs”“The Battle of Caleb IV”
Klingon War “Welcome to Earth Spacedock”“Diplomatic Orders”“Stranded In Space”“Researcher Rescue”“Secret Orders”“The Doomsday Device”“The Galaxy at Large”
Romulan Mystery “Heading Out”“Empress Sela”“Desperate Measures”“Shadow Play”“Taris”
Faction KDF.png Klingon Defense Force-only
Tutorial “End of Watch”“Red Alert!”“Intruder Alert”“Challenge for Command”“Your New Command”“Journey to Qo'noS”
Empire “Duties of Command”“The Hunt is On”“Space Chase”“Manhunt”“Friend or Foe”
Warzone “Bringing Down the House”“The House Always Wins”
Vigilance “Mars, the Bringer of War”“Alpha”
Fek'Ihri Return “Blood of the Empire”“Destiny”“Afterlife”
Faction Romulan Republic.png Romulan Republic-only
Tutorial “A Day on the Farm”“A Day in the Sun”“Virinat, Invaded”“Flight from Virinat”
From the Ashes “Explore the Flotilla”“The Helix”“Crossroads at Crateris”“Gasko Blues”“The Search for New Romulus”“Turning Point”“Neutral No More”
Allies “The Price of Neutrality”“Memory Lane”“Bigger Picture”“Smash and Grab”“Tradecraft”
In Shadows “An Inside Job”“Enemy Action”“Sleepers”“Cloak and Dagger”“Revelation”“Mind Game”
Wasteland “Secrets of Nimbus”“The Lost City of Paradise”“Blind Men Tell All Tales”“The Undying”“A Fistful of Gorn”“Installation 18”
Vengeance “Voice of the Voiceless”“Abducted”“Small Packages”“Last Stand”“The Best Defense”“Turnabout”“Devil's Choice”
Freedom “Toward Freedom”
Faction Dominion.png Dominion-only
Engineered for War “Hunt”“Ceremony”“Turn the Tide”
Faction Khitomer.png Cross-faction
Cloaked Intentions “The Vault”“Mine Enemy”“Frozen”“Coliseum”“Cutting the Cord”“Darkness Before the Dawn”
Cardassian Struggle “Lost and Found”“Spoils of War”“Jabberwocky”“The Factory”“The New Link”
Borg Advance “Task Force Operations”“Report on Borg Activities”“Where Angels Fear to Tread”“A Gathering Darkness”“Assimilation”“Fluid Dynamics”
New Romulus “New Romulus Aid”“Staging Area”“Hidden Camera”“Warehouse”“Mountain Base”“Secret Shuttle Codes”“Overgrown Caves”“Web Access”“Latest Findings”“The Power Source”“Secrets of the Ancients”
Solanae Dyson Sphere “Sphere of Influence”“Circles within Circles”“Supply Woes”“The Contested Zone”“The Omega Standoff”“Tower Control”“A Step Between Stars”“Fluidic Destruction”“Surface Tension”
Delta Quadrant “Escalation”“Mindscape”“Reunion”“Friends in Unlikely Places”“Revelations”“Enemies in All the Usual Places”“All That Glitters”“The Kobali Front”“Capture the Flag”“The Dragon's Deceit”“Alliances”“Know Your Enemies”“Revolution”“Taking Care of Enemies”“Takedown”“What's Left Behind”“Dust to Dust”
Iconian War “Uneasy Allies”“Blood of Ancients”“Delta Flight”“House Pegh”“Time in a Bottle”“Broken Circle”“Butterfly”“Midnight”
Yesterday's War “Temporal Ambassador”“The Once and Future Agent”“The Core of the Matter”“Vorgon Conclusions”“Terminal Expanse”“Survivor”
Future Proof “Sunrise”“Stormbound”“Time and Tide”“The Temporal Front”“Temporal Reckoning”“Ragnarok”
New Frontiers “Echoes of Light”“Of Signs and Portents”“Mirrors and Smoke”“Brushfire”“Beyond the Nexus”“Melting Pot”“Scylla and Charybdis”“The Renegade's Regret”
Gamma Quadrant “Storm Clouds Gather”“Armistice”“The Search”“Doomed to Repeat”“Quark's Lucky Seven”“Tenebris Torquent”“Home”
Age of Discovery “The Plausibility of the Possible”“Impossibility of Reason”“Secrets”“Downfall”
J'Ula's Discovery “Para Pacem”“Illusion of Communication”“Beneath the Skin”“Sentinels”“Rescue and Search”“Within The Briars”“The Ninth Rule”“Ruins of Doom”“The Measure of Morality (Part 1)”“The Measure of Morality (Part 2)”
Klingon Civil War “The Centre Cannot Hold”“The Khitomer Discord”“Partisans”“Knowledge is Power”“Leap of Faith”“Warriors of the Empire”“A Day Long Remembered”
Terran Gambit “Firewall”“Red Shift”
Some missions may appear in alternative orders for some factions.
Mission available Side Content: The Galaxy at Large
Spectres “Spectres”“Skirmish”“Spin the Wheel”“What Lies Beneath”“Everything Old is New”“Night of the Comet”
Wasteland “Secrets of Nimbus”“The Lost City of Paradise”“Blind Men Tell All Tales”“The Undying”“A Fistful of Gorn”“Installation 18”
(Still part of main episode progression for Romulan Republic players.)
Lost Dominion: The 2800 “Lost Dominion”“Second Wave”“Of Bajor”“Operation Gamma”“Facility 4028”“Boldly They Rode”
Cold War “Cold War (wrapper)”“Cold Call”“Out in the Cold”“Cold Comfort”“Cold Case”“Cold Storage”
Delta Quadrant “Kobali Crisis Act I”“Kobali Crisis Act II”“Kobali Crisis Act III”
See also: Featured episodePatrolRemoved MissionsTask Force Operation