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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%)

#naval #eco · 1961 distinct matches · 199 players · 80% of Cortex Geo sea games · team won 53% of 2272 · 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 1961 GAMES
  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 Turbine1Windfor allies
    Order
    1. Bot LabBot Lab after 3 mex, 3 winddone ~1:12, middle half 1:07–1:25

    By 0:55 in all: 3 mex · 3 wind

    The example game in this phase · 3 steps
    1. Mex ×3
    2. Wind ×4
    3. Bot LabBot Labdone 1:12 · 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 ~3:19, middle half 3:02–3:37
    Builders
    • Graverobber3 Graverobber
    • Construction Bot3 Con bot
    Army
    • Grunt1 Grunt

    Some games also: con turret (47%) · trasher (39%) · energy storage (36%)

    By 2:52 in all: 4 mex · 4 wind · 1 energy storage

    The example game in this phase · 6 steps
    1. Construction BotCon bot
    2. GraverobberGraverobber ×2
    3. Mex
    4. GraverobberGraverobber
    5. GuardGuard
    6. ShipyardShipyarddone 2:36 · typical 3:19
  3. 3

    Shipyard to 5:00

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

    Some games also: missile corvette (48%) · Guard (48%) · wind (48%) · destroyer (43%) · gunboat (39%)

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

    The example game in this phase · 18 steps
    1. GruntGrunt
    2. TrasherTrasher
    3. Construction ShipCon ship
    4. Construction BotCon bot
    5. Construction ShipCon ship
    6. HerringMissile corvette
    7. GuardGuard
    8. RiptideFrigatedone 3:52 · typical 4:40
    9. Mex ×2
    10. Construction BotCon bot
    11. RiptideFrigate
    12. Bot LabEat Bot Labreclaimed for its metal
    13. Mex
    14. RiptideFrigate
    15. Death CavalryDeath Cavalry
    16. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    17. OppressorDestroyerdone 5:33 · typical 5:55
    18. Mex
  4. 4

    5:00 to 10:00

    Economy
    • Metal Extractor2Mex
    • Wind Turbine8Wind
    • Energy Converter2Converter
    Order
    1. Geothermal PowerplantGeo after 9 mex, 9 wind, 2 converterin 54% of games
    Builders
    • Construction Turret1 Con turret
    • Death Cavalry2 Death Cavalry
    • Construction Ship1 Con ship
    Army
    • Guard1 Guard
    • Riptide5 Frigate
    Other
    • Naval Radar / Sonar Tower2 Naval Radar / Sonar Tower

    Some games also: Thistle (40%) · submarine (30%)

    By 10:00 in all: 10 mex · 15 wind · 1 geo · 4 converter · 1 energy storage · 2 con turret

    The example game in this phase · 53 steps
    1. Con turret
    2. RiptideFrigate ×2
    3. GuardGuard
    4. RiptideFrigate
    5. Radar TowerRadar Tower
    6. Death CavalryDeath Cavalry
    7. Mex
    8. Advanced Metal ExtractorT2 mexdone 8:32 · typical 9:24
    9. GuardGuard ×2
    10. Geothermal PowerplantGeodone 9:32 · typical 8:08
    11. GuardGuard
    12. Naval Construction Turret
    13. HerringMissile corvette
    14. GuardGuard
    15. Advanced Metal ExtractorT2 mex
    16. GuardGuard
    17. Tidal
    18. Converter ×2
    19. Tidal
    20. Naval Construction Turret
    21. Tidal
    22. RiptideFrigate ×2
    23. Advanced Metal ExtractorT2 mex
    24. RiptideFrigate
    25. Naval Construction Turret
    26. RiptideFrigate
    27. Naval Construction Turret
    28. Naval Energy Storage
    29. RiptideFrigate
    30. ShipyardShipyarddone 11:29
    31. RiptideFrigate
    32. SupporterGunboat ×2
    33. HerringMissile corvette
    34. SupporterGunboat
    35. Advanced Metal ExtractorT2 mex
    36. UrchinUrchin
    37. RiptideFrigate
    38. SupporterGunboat
    39. UrchinUrchin
    40. SupporterGunboat
    41. UrchinUrchin
    42. SupporterGunboat
    43. Con turret
    44. Advanced Metal ExtractorT2 mex
    45. Con turret
    46. Energy storage
    47. Advanced Metal ExtractorT2 mex
    48. Bot LabBot Labdone 14:29
    49. Advanced Metal ExtractorT2 mex
    50. Construction BotCon bot
    51. Con turret ×2
    52. Wind
    53. Construction BotCon bot

Counts are medians over the build's games: half of them build more, half fewer. The example game is _X_'s (40 OS, 15/10/2026); pick another.

Team trades

IN AT LEAST 30% OF ITS GAMES

You hand over

  • Wind Turbine2 Wind to Airfirst at 1:42 · in 73% of games

You get

  • Finch1 Finch from Airfirst at 1:52 · in 81% of games
  • Hercules1 Light transport from Airfirst at 1:59 · in 76% of games
  • Advanced Construction Bot1 T2 con bot from Techfirst at 7:44 · 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

05k10k
0:005:0010:0015:00

metal

Own metal lost

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

metal

2272 games.

Show as table
ByMetal produced: This buildEnemy metal destroyed: This buildOwn metal lost: This build
1:0039800
2:0092900
3:00156100
4:002866051
5:00406714652
6:005416440232
7:006893905528
8:0085761530891
9:001042924351321
10:001255634711987
11:001508946412764
12:001806360153623
13:002131072054344
14:002484384745186
15:002876397086199
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

_X_

40.3 OS · 15/10/2026

Open source match ↗

3 received units · includes a constructor
101 metal received · 28634 energy received

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

Typical milestones

Bot Lab1:12Middle 50%: 1:07–1:25 · n=2245
Shipyard3:19Middle 50%: 3:02–3:37 · n=2263
Orca4:18Middle 50%: 3:52–4:59 · n=1535
Riptide4:40Middle 50%: 4:09–5:21 · n=2212
Oppressor5:55Middle 50%: 5:13–6:43 · n=2091
Geothermal Powerplant8:08Middle 50%: 7:10–9:25 · n=1530
Advanced Metal Extractor9:24Middle 50%: 8:46–10:21 · n=1989

Played most by

SHOGVN227games of this buildElpoloow178games of this buildsirniho124games of this buildOptimusprimenutt92games of this buildhihimik79games of this build