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Harvesting bots (or harvesters) are a type of terran automaton, created by Egon Stetmann. They are capable of harvesting terrazine, and utilizing defensive matrix technology on themselves.[1]


According to Egon Stetmann, he created the harvesting bots himself, in a cave, with a box of scraps, with the intention to collect terrazine. He formed a familial connection with these bots, calling one named Gary his best friend, and giving them the best oil. Whether by design or by upgrades, Gary gained some semblance of an artificial intelligence, and could communicate with Stetmann, often doubting his heroic antics and tactics.[2]

In response to the intrusions of the Tal'darim on Bel'shir, Stetmann upgraded Gary to be combat ready, and help him create the Mecha Swarm to protect his new home.[3]

AlliedCommanders SC2-LotV Art1.jpg

This article or section contains information derived from Co-op Missions, and should not be considered part of the official StarCraft storyline.

In the timeline of Co-op Missions, Stetmann made plans for armed super harvesting bots, with increased abilities. However, as he thought Gary would get jealous, these upgrades were only applied to Gary.[4]

Stetmann utilized harvesting bots in both his initial survey of Bel'Shir for terrazine and in his return for more terrazine on "Gary's birthday".[5]

Game Unit[]

Harvesting bots appear in the Co-op Missions map "Mist Opportunities" as NPC units. They will periodically spawn from the cliff by the players' base, and move on tracks towards the designated terrazine sites. The players must escort the bots to protect them from enemies. Contrary to their unit model base, the science vessel, the harvesting bots are ground units, and have a cannon similar looking to the liberator Concord cannon.[5]


Harvesting bots have a self-casting defensive matrix ability, identical to that of the battlecruiser. It lasts 10 seconds and absorbs 500 damage before falling. It costs no energy to cast but has a 15-second cooldown.[5]

Known Harvesting Bots[]


  • As the harvesting bots gather terrazine, the empty fuel tank visible in the middle of the unit will visibly fill with the gas.
  • The "In a cave with a box of scraps" line is a reference to Tony Stark from the first Iron Man movie.


  1. Blizzard Entertainment staff. 2016-08-31. Patch 3.6 Preview: New Co-op Map: Mist Opportunities. Blizzard Entertainment. Accessed 2016-08-31.
  2. Blizzard Entertainment. Co-op Commander: Stetmann Accessed 2019-05-29.
  3. Robert Brooks (w), Carlos Rodríguez (i) and Andrew Dalhouse (c). (September 12, 2019). StarCraft II: This Sacred Land: Part 2. Blizzard Entertainment. StarCraft II: This Sacred Land: Part 2 Accessed 2019-09-12.
  4. Blizzard Entertainment. Co-op Missions. (Activision Blizzard). PC. Egon Stetmann (in English). 2019.
  5. 5.0 5.1 5.2 Blizzard Entertainment. StarCraft II: Legacy of the Void. (Activision Blizzard). PC. Mission: Co-op Missions, Mist Opportunities (in English). 2016-09-13.