The Queens' fortress is using a friendly colony near Jupiter as target practice for its new long-distance artillery. Breach the fortress and destroy the Cannon.

Assault is a Mission type identical to Sabotage, requiring Tenno to breach into the Kuva Fortress and destroy its Navar-Cannon, a long-range artillery cannon preparing to annihilate a Tenno-allied colony with a tectonic shell. Koro, Kuva Fortress is currently the only node with this mission type. It is accessible only after completing The War Within quest.


The mission is split into several major objectives:

  1. Breach the gates by delivering a moltecoil charge that is given at the beginning of the mission, then defending the area for 30 seconds while the moltecoil melts the locks.
    • A friendship door must be opened in order to access the gates and plant the moltecoil.
  2. Find and disable 3 Navar-Cannon systems via hacking before the cannon fires a tectonic shot at a colony allied with the Tenno.
    • After hacking into the Navar-Cannon room, the players have two minutes to complete this task --- otherwise, the mission will fail.
    • Hacking a system or destroying an exposed circuit on the front of each bunker will lower its walls, allowing consoles to be accessed with reduced risk of tripping Fortress Scanners and activating traps.
    • Tenno may find it quicker to use the ziplines or parkour across the ravine, rather than running around to the back of other bunkers.
  3. Reach the command center, acquire 3 telemetry keys, and defend the telemetry console for 50 seconds while the Lotus recalibrates its targeting systems. The mission will fail if the console is destroyed.
  4. Return to the cannon's control room and fire the cannon's tectonic shot at a Grineer galleon.
    • The cannon controls are configured like a friendship door, requiring two players to operate while in a squad.
  5. Return to the command center and destroy four targets on the cannon's targeting mechanism, then destroy the exposed fuel injector to conclude the sabotage and enable extraction.


Assault missions reward objective Affinity upon the completion of the following mission objectives:

  • Defend the Area: 4000 affinity
  • Disable the Cannon: 4000 affinity (normal completion) or 8000 affinity (stealth completion)
    • Stealth Objective affinity is awarded if no Fortress Scanners are triggered during this objective; otherwise, normal Objective affinity is awarded.
  • Destroy Targeting Mechanism: 4000 affinity

Standard Assault missions do not provide any non-affinity Mission Rewards.


Planet Mission Name Faction Credit Reward Addtional Credit Reward Wiki's DropTableAlias Level Tileset
Kuva Fortress Koro Grineer 3,800 0 29 - 31 Grineer Asteroid Fortress
There are a total of 1 Assault Missions


  • Like the reactor rooms of Reactor Sabotage, the Navar-Cannon room is usually guarded by at least one Eximus enemy.
  • Archwing enemies, namely Kuva Dargyns, can attack players in two rooms of this mission: the gate room (where the moltecoil is delivered) and the Navar-Cannon room.
  • Assault is unusually complex for a non-endless mission type, requiring a squad to deliver four hand-carried items, defend two objects of interest for a total of 80 seconds, complete four hacking minigames, operate two pairs of friendship consoles, and destroy five objects in order to complete all objectives.

Patch History[]

Update 35.0 (2023-12-13)

  • Fixed players getting stuck respawning endlessly if they are standing on top of the cannon in the Koro, Kuva Fortress mission after it has been fired.

Hotfix 31.6.2 (2022-06-15)

  • Fixed the Sabotage target points in the Kuva Fortress Assault mission missing their color to indicate where to shoot.

Update 29.2 (2020-09-29)

  • Fixed Assault missions not failing when the timer runs out.

Update 25.7 (2019-08-29)

  • Fixed missing explosion from the cannons of a Grineer Galleon in the Koro, Kuva Fortress Assault mission.

Update 25.3 (2019-07-06)

  • Fixed progression stopper caused by players being able to pick up more than one Telemetry Key, except they stack and the newly picked up key goes missing as reported here

Hotfix 19.0.3 (2016-11-14)

  • Polished aspects of Kuva Fortress Assault missions. Individual markers have been added to shootable targets during the 'destroy the targeting mechanism' phase, and added teleport action under the falling debris so players don't get stuck when it's destroyed.
  • Kuva Fortress Cache hunting has been moved to Fortress Exterminate missions as it makes more sense for the pacing of the mission demands.
  • Fixed 'You picked up a key' transmission on the Kuva Fortress Assault mission playing for all players rather than just the user picking up the key.

Update 19.0 (2016-11-11)

  • Introduced.