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This article is about the Borg Advance mission. Missions with the same name include the former Federation Tour of Duty Mission: Assimilation (Tour of Duty), and the original pre-Season 9 Undine Advance Mission: Assimilation (Undine Advance).
Faction Khitomer.png Assimilation
Borg cube interior.png
Followed by:
“Fluid Dynamics”
Story Arc:
Borg Advance
April 22, 2014
Lv 46: 4300 Experience Point icon.png
Lv 50: 8600 Experience Point icon.png
Lv 46: 4125 Experience Point icon.png
Lv 50: 9550 Expertise icon.png
You will receive the following reward:
Plus one of the following:

In Assimilation the player's starship is dispatched to investigate Borg and Undine activity in an unremarkable system.


Mission Text[]

<rank>, the Undine vessel you were tracking from the Kessik system has been sighted near NCG-4447.

Borg ships have also been detected in this area. While there are no populated systems in danger there, we still need to know why the Borg and the Undine have escalated their conflict now.

Go find the Borg sphere that took the Undine from Kessik IV. The answers we need will be there.


Investigate the Borg presence in NGC-4447, which is located in the Beta Quadrant.


  • Pursuit
    • Go To Deep Space NCG-4447
    • Scan Undine Debris
    • Defeat the Borg
    • Defeat Reinforcement
    • Follow the Borg
  • Defender
    • Secure the Area
      • Defeat the Borg (0/2)
      • Defeat the Undine (0/2)
  • Borg, Interrupted
    • Prevent the Borg From Capturing the Undine Ship
    • Beam to Borg Cube to Investigate
  • The Cube

    Inside the damaged Borg cube

    • Investigate Borg Cube
    • Download Borg Data (0/3)
    • Lower Force Field
  • Guinea Pigs
    • Find the Undine
    • Temporal objective.png Investigate Temporal Probe (Temporal Agent)
    • Destroy Borg Devices (0/3)
    • Continue Cube Exploration
    • Defeat Fully Assimilated Undine
    • Overload the Vinculum
    • Return to Ship
  • Resistance Not Futile
    • Tactical Briefing
    • Destroy the Borg Cube
    • Depart System
  • Report to Captain Nicholas Martin / Captain K'rav


Icon Name Description How to Get Points
The Impossible icon.png The Impossible Gather information from the partially assimilated Undine Scan the Undine on the examination tables. 25
Assimilated icon.png Futility Refuted Prevented the Borg Cube from Transmitting Data to Collective Complete the mission 10


There is no walkthrough for this mission, yet. You can help STOWiki by writing it here.

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 <>
46–49 Faction FED25.png Rear Admiral UH
Faction KDF.png Major General
Faction Romulan Republic.png Subadmiral II
1935 1856 X
50 Vice Admiral 2126 1856 XI


  • New episode released as part of Season Nine: A New Accord on April 22, 2014 and integrated into the revamped episode Borg Advance, combining the previous episodes Borg Collective and Undine Advance.
  • Assimilation is a significantly reworked version of the previous Undine Advance mission “Assimilation (Undine Advance)”. It includes a complete revamp of the Borg Cube interiors used in the two ground sections The Cube (replacing The Maze) and Guinea Pigs, removing all Assimilated Undine Guards and many Partially Assimilated Undine from the latter section.
  • The original The Impossible accolade – requiring to scan eight Partially Assimilated Undine – has been replaced with a much simpler, single scan in the fourth room of the Cube, during the Guinea Pigs section.
  • The original Assimilated story accolade given on the space map has been replaced with a new Assimilated general accolade, for becoming assimilated by the Borg on any Borg ground map.
  • If you are quick enough, after you disconnect the Undine from the Borg devices you can actually revive them as they count as downed allies. They don't do anything though, just stand there and sniff the air.
  • At the end of the mission, your objective is to destroy the Borg cube but the Undine will do it for you.
  • There's a minor Easter egg in this mission. When you arrive in the room that contains the Undine parts in vats, if you move near any of them with Borg eyes parts installed and swing your camera so that it's as if you're looking away from the head, its eyes will light up red:

2016-02-10 1135.png

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