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The Sweeper is a combat drone used by the Last Bastion, armed with Golden Rocket multi-launchers that can only attack ground targets when deployed, during which it is also hidden to the enemies' sight, making it useful for ambushes.

Official description

Sweepers hide in the snows surrounding the Last Bastion's stronghold, waiting for their targets to approach before firing a volley of 'Golden Rockets' straight at them. Its turret has been specifically designed to allow it to fire the projectiles without revealing its position. However, a watchful commander will still be able to deduce where the missiles came from, by carefully observing the battlefield. Even so, Sweepers make an excellent addition to the Last Bastion's defensive-oriented arsenal.

With a set of windspin engines of its own, it can cross water areas and then burrow in the ground and conceal its presence once ordered to the deploy. Naturally, the windspin engine will make the unit's speed increase near a Spinblade. While the Sweeper is equipped with "Golden Rockets", its turret's compact horizontal design does not make it possible for this drone to target aircraft. Keep in mind, that the Sweepers do not arm their weapons until buried in the ground.[1]


As with the Last Bastion’s other units that focus on powerful defense, the Sweeper drones are perfect for when enemies are trying to stockpile tanks or other heavy vehicles somewhere near a Last Bastion base so they can plan an offensive. They are cloaked whenever they are deployed, making them difficult to detect before it’s too late. In case that wasn’t enough, Sweepers remain stealthed even when firing their Golden Rockets, making them incredibly annoying if they are overlooking a cliff or other elevated terrain.

However, as terrifying as they can be, they have a few glaring weaknesses. The most important weakness is being unable to attack aircraft despite firing Golden Rockets. That may not sound like much at first, but remember this: Every other unit that fires Golden Rockets are capable of attacking aircraft... except this one. This means that if one Wolfhound or other flying unit happens to find a Sweeper, especially if it is moving, it can be dispatched before it can deal significant damage to an armored division. A lone Sweeper takes quite a long time to reload, only making them a real threat when they are amassed, and the fact that it is lightly armored for a Last Bastion unit doesn’t help all that much.

AI behavior

Sweepers controlled by the AI have the following attack patterns:


  • 1x deploying near friendly base or enemy base
  • 1x deploying near a deployed Sweeper

The AI is not programmed to relocate Sweepers once they are deployed.

It is worth noting that all task forces will only be built when the AI owns a Cyberkernel, which is not its prerequisite building.


  • Effective against infantry and armored vehicles.
  • Cloaked when deployed.
  • Can attack without revealing.
  • Can ambush units without warning, especially those without detection capabilities.
  • Decent attack range.
  • Being a robot it's immune to mind control, hijacking, radiation and poison.
  • Amphibious.
  • Does not sink when disabled over water.
  • Fast movement speed when boosted by Spinblades.
  • Can receive firepower boost when near a deployed SODAR Array.
  • Fragile and lightly armored.
  • Slow reloading rate.
  • Cannot deploy and attack when over water.
  • Cannot target structures and aircraft.
  • Weak against stealth detection.
  • Must be stationary and deployed to attack.


See also

Other Foehn units equivalent in tier accessibility:

External links