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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
All Starfleet Factions Starfleet-only
Faction KDF.png Klingon Defense Force-only
Faction Romulan Republic.png Romulan Republic-only
Faction Dominion.png Dominion-only
Faction Khitomer.png Cross-faction
Mission available Side Content: The Galaxy at Large
See also: Featured episodePatrolRemoved MissionsTask Force Operation