I played a 3v3 last night with mostly novice players. It was PTT vs. ZZT. One of my opponents got sight in the rear of our bases and started flooding the place with Roaches and Hydralisks via Nydus Worms.
We were able to fend off this attack with our various defensive units. Unfortunately, these had been up at the choke point and not really prepared to run back, which took some time so the Zerg were able do to some serious damage. What's more, the Zerg were able to retreat handily back to the Nydus Worm and live to harass again a minute later somewhere else.
What are some good ways to:
- Detect an incoming Nydus attack quickly to react?
- Destroy the incoming Nydus Worm before it completes building?
- Take out the Nydus Worm after the units come out so they can't retreat?
- Prevent the whole thing from happening in the first place?
In this case I don't think denying sight would be possible, considering they had a Terran player with no qualms about using Scanner Sweeps.
My initial thought for some defense was maybe getting some patrolling Marines or Reapers in the backs of the bases, just to start shooting at the thing when they saw it building. But then I wasn't sure how many it would take to soundly deny the building from completing.
Another thought I had was perhaps a Photon Cannon near the edge... would that be enough to take out the Nydus Worm before it completes (assuming we could place it well to see the best Nydus build locations)?
PS We did end up winning the game due to superior macro... and one of their players unfortunately disconnecting.