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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
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