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The Grineer Asteroid Fortress, or Kuva Fortress, is a Grineer tile set featuring heavily defended chambers and rooms built into dark asteroid rock, and adorned with the blood red ornaments signifying the royalty of the Grineer Queens, this tile set expresses the power and dominance of the Grineer over the Origin system. Currently, this tile set is exclusive to the Kuva Fortress.

This tile set also incorporates the ability to use Archwings in select locations.

Unique Enemies[]


The Grineer Asteroid Fortress features many wide open areas with several side paths and alternate routes, making it ideal for Stealth gameplay. Areas exposed to space can have bridges and ziplines that allow passage out of enemy sight, while vertical heights and hidden tunnels grant lots of places and opportunities from which to flank and ambush enemies.


This tile set possesses a significant number of Fortress Scanners scattered throughout, which sweep back and forth over fixed areas with a visible orange pane of light. If the scanners detect a player, the room said sensors are located in will deploy various defensive turrets to deal with the threat. Several different turret types can be found within the tile set:

  • Gun Turrets, which are rapid fire weapons that can deliver a large volume of fire against Tenno.
  • Missile Turrets that fire explosive homing missiles.
  • Flamethrower Turrets that usually protect stairwells and choke points.
  • Electric Turrets that throw electric arcs that diminish shielding.
  • Latcher Dispensers that deploy large numbers of Latchers to swarm the enemy.

It is possible to destroy turrets once they are activated, although they are significantly more resistant than Corpus analogues and some of them will be replaced by new ones raised from the floor mechanisms beneath after a short time. Unlike their Corpus counterparts, the turrets will remain active for a set duration of time upon detecting players. Turrets can be temporarily deactivated by shutting down the alarm for a particular room via Hacking, and players can avoid the visible scanning beams by timing their passage to avoid being detected, or use any ability-based invisibility. MirageIcon272.png Mirage is also able to deactivate Fortress Scanners with Sleight of Hand, as well as take control of any turrets within range of the ability, causing them to deploy and engage any hostiles within the area.


Apart from active defenses, the Grineer Asteroid Fortress features a large number of explosive mines of various types, that can deal massive damage to players that trip them. There are two variants that can be encountered:

  • Land Mines: small mines that detonate when players are within the vicinity, dealing significant damage to everything caught in its blast. This mine is always active and can be destroyed from afar via any damaging attack.
  • Shrapnel Mines: large mines buried underground with a small portion visible on the surface. When a player is within the blast radius, the top of the mine is launched upwards into the air, which then showers the area below with lethal shrapnel in a large area. Unlike Land Mines, but similar to turrets, Shrapnel Mines are indestructible and harmless until they are armed by sensors. When a player is near the mine it will arm itself with a loud beep and extend its sensors on the top. Shrapnel mines can also hurt Warframes in the Rift.

Mission type dependent hazards[]

  • Rescue missions introduce pressurized steam hazards and doors that open themselves only to Wardens. Additionally, there are 6 Wardens instead of the standard 4.
  • Defense missions have various hostile defenses around the objective that can activate each wave, which include electrified floors, poison gas, gun turrets, and flamethrowers.


Planet Mission Name Type Faction Level Mastery EXP
Kuva Fortress Dakata Exterminate Grineer 28 - 30 0
Kuva Fortress Koro Assault Grineer 29 - 31 0
Kuva Fortress Rotuma Mobile Defense Grineer 30 - 32 0
Kuva Fortress Nabuk Defense Grineer 30 - 32 0
Kuva Fortress Pago Spy Grineer 31 - 33 0
Kuva Fortress Garus Rescue Grineer 31 - 33 0
Kuva Fortress Taveuni Survival Grineer 32 - 37 0
Kuva Fortress Tamu Disruption Grineer 35 - 40 0
There are a total of 8 Missions on the Grineer Asteroid Fortress Tile Set

Conclave Maps[]

There is currently 1 map for Conclave from this tileset.


  • At some point individual scanners might stop raising alarms.
  • Sometimes players will spawn in open air, causing them to fall out of the map.


Patch History[]

Hotfix 31.1.3 (2022-02-15)

  • Fixed multiple crashes caused by objects in the Kuva Fortress tileset looping behaviors.

Update 30.9 (2021-11-11)

  • Fixed some issues with waypoint marker navigation in parts of the Grineer Fortress.

Update 29.10 (2021-03-19)

  • Fixed level objects clipping through the Grineer Fortress tileset.
  • Fixed enemy spawn points being embedded in the ground in the Grineer Fortress tilesets.

Update 28.0 (2020-06-11)

  • Fixed Resources sometimes falling into turret pits in the Grineer Asteroid Fortress tileset.

Update 27.4 (2020-05-01)

  • Made optimizations to the Grineer Fortress tileset.

Update 27.1 (2020-02-04)

  • Fixed being able to revive in the ceiling in part of the Grineer Fortress.

Hotfix 25.3.2 (2019-07-12)

  • Changed Spy panic buttons in the entrance hallways of Spy Vaults to stop enemies using them and setting off the alarm when outside the vault in Grineer Fortress tileset.

Update 19.0 (2016-11-11)

  • Introduced.