Why does the Zerg AI player sometimes get stuck at the very beginning of the game and doesn't ever evolve beyond producing drones? This happened to me in StarCraft: Brood War, in a melee game against computer player(s). I'm not sure it is map-specific, but I'm pretty sure it happens on the Big game hunters map.

This is a mystery for me since I was a child, and now that I can understand some AI, I would really like to understand this.

  • 1
    Never really encountered this. Is this related to some specific difficulty level (custom maps)?
    – Mario
    Commented Oct 22, 2013 at 11:07
  • 2
    For what it's worth I have encountered this.
    – Ender
    Commented Oct 22, 2013 at 18:47
  • Map, I'm pretty sure it did happen on Big Game Hunters. Commented Oct 23, 2013 at 16:46
  • I'm not sure this is something we can really answer; we'd have to pull apart the source code to really get at the root of the problem, I think.
    – Frank
    Commented Oct 23, 2013 at 16:54

1 Answer 1


The AI gets stuck because it can't find a spot to place his spawning pool. IIRC, too many minerals or doodads near the hatchery can cause Zerg AI's building placement algorithm to fail. Unfortunately, I don't remember how I know this.

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