This 3gate Robo gets an Observer for detection and a fast Mothership Core in order to play safe. It can then attack your opponent with a strong army or take an expansion and tech to Colossi.
- 9 – Pylon
- 13 – Gateway
- 15 – 2 Assimilators
- 16 – Pylon
- 18 – @100% Gateway, start Cybernetics Core
- 20 – Zealot and Pylon
- Place the Zealot on “Hold Position” at your main wall
- 23 – @100% Cybernetics Core, start Warpgate Research, Mothership Core, and 1st Sentry
- 29 – @100 Gas, start Robotics Facility and Pylon
- @100 Gas, start 2nd Sentry, and 2 more Gateways
- @100% Robotics Facility, start Observer and 3rd Sentry
- @100% Observer, start Immortal
- Benchmark: When 1st Immortal finishes (@7:00ish), you should have 1 Zealot, 3 Sentries, an Observer, an Immortal, and a Mothership Core with 28 Probes at home.
This 3gate Robo gets you a fast Mothership Core for defense with a reasonably timed Observer for detection, so scouting is minimal. Use a scouting Probe to check that your opponent is taking their natural Hatchery. If your opponent does not expand early, then be prepared to defend early Roaches/Speedlings with your Mothership Core, Zealot on hold position at your main wall, and forcefields.
This 3gate Robo can transition into a macro build or an all-out attack. If you want to attack with this build, then constantly produce Immortals after your first Observer and warp-in units 3 at a time. Set up a proxy Pylon near your opponent’s base and attack while reinforcing with 3 Warpgate units at a time.
If you want to play a more macro style, then stop all army production after your first Immortal and start a Nexus, Forge, and then Robotics Bay in that order. Going for Colossus production and Ground upgrades will set you up for a strong midgame.
Pros and Cons
This 3gate Robo is strong because it is so easy and safe to execute, and can transition very easily into a strong attack or a macro style of play.
This build is viable on every map. However, it is best to transition into a Nexus on larger maps and attack with Immortals on smaller maps.
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