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Geo sea / Cortex / Economy first / OBSERVED BUILD

Standard geo sea

Cortex Geo sea build order · Supreme Isthmus

Builds a bot lab then shipyard (usually in the cove), eats the bot lab for metal, and pumps out submarines, frigates and destroyers to contest the sea while supporting allies with energy.

Usually shipyard in the cove (98%) · geo on time (83%)

#naval #eco · 1396 distinct matches · 177 players · 56% of Cortex Geo sea games · team won 54% of 1548 · Recently observed

HOW TO PLAY IT

Key timing: Bot Lab by 1:12, Shipyard by 3:17

  1. Open 3 mex into wind, then drop Bot Lab in cove.
  2. Finish Bot Lab, keep teching mex and wind.
  3. Get Shipyard up and start pumping subs and frigates.
  4. Eat the Bot Lab for metal once you have T1 units defending.
  5. Push out submarine, frigate, destroyer to contest sea.
  6. Bring geothermal online and transition toward T2 constructor.

Phase by phase

TYPICAL OF ITS 1396 GAMES · AGAINST STANDARD GEO SEA
  1. 1
  2. 2
  3. 3
  4. 4
PLAY THE OPENING

Follow the example game's first 6:00 step by step: what to build now, what comes next, and where it goes. At 1× it keeps pace with your own game.

  1. 1

    Up to the Bot Lab

    Economy
    • Metal Extractor3Mex
    • Wind Turbine3Wind
    • Wind Turbine2Windfor allies+2 vs standard
    Order
    1. Bot LabBot Lab after 3 mex, 3 winddone ~1:12, middle half 1:08–1:21

    By 0:55 in all: 3 mex · 3 wind

    The example game in this phase · 3 steps
    1. Mex ×3
    2. Wind ×3
    3. Bot LabBot Labdone 1:05 · typical 1:12
  2. 2

    Bot Lab to Shipyard

    Economy
    • Metal Extractor1Mex
    • Wind Turbine2Wind
    Order
    1. ShipyardShipyard after 4 mex, 4 wind, 1 energy storagedone ~3:20, middle half 3:02–3:39
    Builders
    • Graverobber3 Graverobber
    • Construction Bot3 Con bot
    Army
    • Grunt1 Grunt

    Some games also: con turret (48%) · trasher (40%) · energy storage (39%)

    By 2:53 in all: 4 mex · 4 wind · 1 energy storage

    The example game in this phase · 12 steps
    1. Construction BotCon bot
    2. Wind
    3. Construction BotCon bot
    4. Wind
    5. GraverobberGraverobber
    6. Energy storage
    7. GraverobberGraverobber
    8. Mex
    9. TrasherTrasher
    10. GruntGrunt
    11. Mex
    12. ShipyardShipyarddone 3:06 · typical 3:20
  3. 3

    Shipyard to 5:00

    Economy
    • Metal Extractor4Mex
    Order
    1. Bot LabEat Bot Lab
    Builders
    • Construction Ship1 Con ship
    Army
    • Guard1 Guard
    • Riptide2 Frigate
    • Orca1 Submarine
    • Herring1 Missile corvette
    Other
    • Radar Tower1 Radar Tower

    Some games also: wind (48%) · gunboat (43%) · destroyer (42%) · converter (40%) · con turret (31%)

    By 5:00 in all: 8 mex · 6 wind · 1 energy storage · 1 con turret

    The example game in this phase · 17 steps
    1. Bot LabEat Bot Labreclaimed for its metal
    2. Construction ShipCon ship
    3. Mex
    4. RiptideFrigatedone 3:30 · typical 4:46
    5. Radar TowerRadar Tower
    6. Mex
    7. RiptideFrigate
    8. GuardGuard
    9. Wind
    10. OppressorDestroyerdone 4:24 · typical 5:58
    11. Mex
    12. GuardGuard
    13. Naval Construction Turret
    14. GuardGuard
    15. HerringMissile corvette
    16. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    17. GuardGuard
  4. 4

    5:00 to 10:00

    Economy
    • Metal Extractor2Mex
    • Wind Turbine6Wind−8 vs standard
    • Energy Converter3Converter+3 vs standard
    Order
    1. Geothermal PowerplantGeo after 9 mex, 9 wind, 2 converterin 77% of games
    Builders
    • Construction Turret1 Con turret
    • Death Cavalry2 Death Cavalry
    • Construction Ship1 Con ship
    Army
    • Guard2 Guard
    • Riptide5 Frigate
    • Herring2 Missile corvette

    Some games also: Thistle (43%) · Urchin (30%)

    By 10:00 in all: 10 mex · 13 wind (standard 21) · 1 geo · 4 converter (standard 2) · 1 energy storage · 2 con turret

    The example game in this phase · 51 steps
    1. Death CavalryDeath Cavalry
    2. Wind
    3. RiptideFrigate
    4. Wind ×3
    5. RiptideFrigate
    6. Wind
    7. GuardGuard
    8. OppressorDestroyer
    9. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    10. Wind
    11. UrchinUrchin
    12. Wind
    13. OppressorDestroyer
    14. Wind ×4
    15. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    16. UrchinUrchin
    17. Mex
    18. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    19. OppressorDestroyer
    20. Advanced Metal ExtractorT2 mexdone 9:26 · typical 9:23
    21. Geothermal PowerplantGeodone 9:46 · typical 8:09
    22. RiptideFrigate ×2
    23. HerringMissile corvette
    24. Advanced Metal ExtractorT2 mex
    25. Naval Construction Turret
    26. Radar TowerRadar Tower
    27. Naval Construction Turret
    28. RiptideFrigate
    29. Converter
    30. Advanced Metal ExtractorT2 mex
    31. RiptideFrigate
    32. Converter
    33. OppressorDestroyer
    34. Converter ×2
    35. HerringMissile corvette
    36. RiptideFrigate
    37. Advanced Metal ExtractorT2 mex
    38. Converter
    39. RiptideFrigate
    40. OppressorDestroyer
    41. Converter
    42. HerringMissile corvette
    43. Converter
    44. RiptideFrigate
    45. Naval Construction Turret
    46. Death CavalryDeath Cavalry
    47. Converter
    48. Advanced Metal ExtractorT2 mex
    49. RiptideFrigate
    50. Tidal ×2
    51. OppressorDestroyer

Counts are medians over the build's games: half of them build more, half fewer. The example game is PlatinumBlonde's (59 OS, 03/10/2026); pick another.

Team trades

IN AT LEAST 30% OF ITS GAMES

You hand over

  • Wind Turbine2 Wind to Airfirst at 1:41 · in 77% of games

You get

  • Finch1 Finch from Airfirst at 1:51 · in 82% of games
  • Hercules1 Light transport from Airfirst at 2:00 · in 77% of games
  • Advanced Construction Bot1 T2 con bot from Techfirst at 7:42 · in 90% of games

How it plays out

Typical game of this build, running totals by minute

Metal produced

010k20k30k
0:005:0010:0015:00

metal

Enemy metal destroyed

05k10k15k
0:005:0010:0015:00

metal

Own metal lost

02.5k5k7.5k
0:005:0010:0015:00

metal

1548 games.

Show as table
ByMetal produced: This buildEnemy metal destroyed: This buildOwn metal lost: This build
1:0039800
2:0092900
3:00155900
4:002870051
5:00406315052
6:005411457250
7:006884923538
8:0085651532890
9:001042724321317
10:001257734712004
11:001519146002751
12:001827660193658
13:002164572784418
14:002537686665285
15:0029246100046339
WHAT THE NUMBERS SAY

This is the role's own baseline, winning a bit over half its games with steady eco scaling and sea trades roughly matching losses.

  • + Team wins slightly over half of games played.
  • + Metal production scales from ~4k to ~29.5k by 15:00.
  • − Own metal lost climbs to 6875 by 15:00, matching kills closely.
  • − T2 factory only reached in 40% of games, limiting late power.
THE EXAMPLE YOU ARE READING

PlatinumBlonde

59.2 OS · 03/10/2026

Open source match ↗

4 received units · includes a constructor
269 metal received · 30501 energy received

Allied construction assistance is unknown. Timings are observations, not a promise of solo reproducibility.

Typical milestones

Bot Lab1:12Middle 50%: 1:08–1:21 · n=1539
Shipyard3:20Middle 50%: 3:02–3:39 · n=1543
Orca4:21Middle 50%: 3:52–5:02 · n=1004
Riptide4:46Middle 50%: 4:11–5:28 · n=1498
Oppressor5:58Middle 50%: 5:14–6:47 · n=1452
Geothermal Powerplant8:09Middle 50%: 7:12–9:24 · n=1476
Advanced Metal Extractor9:23Middle 50%: 8:47–10:22 · n=1367

Played most by

Elpoloow142games of this buildhihimik73games of this buildAlphacure68games of this buildSHOGVN59games of this buildPRO_Rerory52games of this build