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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 · 1967 distinct matches · 199 players · 80% of Cortex Geo sea games · team won 53% of 2279 · 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 1967 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 · 4 steps
    1. Mex ×3
    2. Wind ×2
    3. Wind ×2for Air
    4. Bot LabBot Labdone 1:14 · 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 · 11 steps
    1. GraverobberGraverobber ×3
    2. Construction BotCon bot
    3. Wind ×2
    4. TrasherTrasher
    5. Con turret
    6. GruntGrunt ×2
    7. Construction BotCon bot ×2
    8. Mex
    9. Energy storage
    10. Mex
    11. ShipyardShipyarddone 3:53 · 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. Radar TowerRadar Tower
    2. Bot LabEat Bot Labreclaimed for its metal
    3. Mex
    4. Radar TowerRadar Tower
    5. Construction ShipCon ship
    6. GuardGuard
    7. HerringMissile corvette
    8. GuardGuard
    9. RiptideFrigatedone 4:23 · typical 4:40
    10. Mex
    11. Radar TowerRadar Tower
    12. GuardGuard
    13. RiptideFrigate
    14. GuardGuard
    15. ThistleThistle
    16. Mex
    17. Geothermal PowerplantGeodone 6:07 · typical 8:07
    18. OppressorDestroyerdone 5:58 · typical 5:55
  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 · 65 steps
    1. Converter
    2. Death CavalryDeath Cavalry
    3. Construction ShipCon ship
    4. Converter
    5. HerringMissile corvette
    6. Converter
    7. RiptideFrigate
    8. Converter
    9. RiptideFrigate
    10. Converter
    11. RiptideFrigate
    12. Death CavalryDeath Cavalry
    13. OrcaSubmarine ×2done 7:50 · typical 4:18
    14. Advanced Metal ExtractorT2 mexdone 9:15 · typical 9:24
    15. RiptideFrigate ×5
    16. Con turret
    17. Advanced Metal ExtractorT2 mex
    18. HerringMissile corvette
    19. OppressorDestroyer
    20. OrcaSubmarine ×2
    21. Death CavalryDeath Cavalry
    22. HerringMissile corvette
    23. Advanced Metal ExtractorT2 mex
    24. RiptideFrigate ×2
    25. Wind
    26. RiptideFrigate
    27. Wind ×2
    28. OppressorDestroyer
    29. Wind
    30. Death CavalryDeath Cavalry
    31. Wind
    32. Advanced Metal ExtractorT2 mex
    33. Wind
    34. HerringMissile corvette
    35. Wind
    36. RiptideFrigate
    37. Death CavalryDeath Cavalry
    38. Construction ShipCon ship
    39. Wind ×2
    40. Construction ShipCon ship
    41. Wind
    42. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    43. Wind
    44. Death CavalryDeath Cavalry
    45. Naval Construction Turret
    46. Wind
    47. Naval Construction Turret
    48. Wind ×2
    49. Naval Construction Turret
    50. Advanced Metal ExtractorT2 mex
    51. Death CavalryDeath Cavalry
    52. Wind
    53. Mex
    54. Death CavalryDeath Cavalry
    55. Wind
    56. Death CavalryDeath Cavalry
    57. Wind
    58. Advanced ShipyardAdvanced Shipyarddone 13:25
    59. Death CavalryDeath Cavalry
    60. Wind ×4
    61. Advanced Construction SubAdvanced Construction Sub
    62. Advanced Metal ExtractorT2 mex
    63. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    64. Wind
    65. PathfinderPathfinder

Counts are medians over the build's games: half of them build more, half fewer. The example game is [MooDeng]NongJohn's (38 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

2279 games.

Show as table
ByMetal produced: This buildEnemy metal destroyed: This buildOwn metal lost: This build
1:0039800
2:0092900
3:00156000
4:002865051
5:00406714652
6:005416440231
7:006893905526
8:0085771530891
9:001043024351321
10:001255434711984
11:001508846402761
12:001807160153621
13:002131572124345
14:002484384805186
15:002875597316200
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

[MooDeng]NongJohn

38.1 OS · 15/10/2026

Open source match ↗

3 received units · includes a constructor
238 metal received · 33325 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=2252
Shipyard3:19Middle 50%: 3:02–3:37 · n=2270
Orca4:18Middle 50%: 3:52–4:59 · n=1540
Riptide4:40Middle 50%: 4:09–5:21 · n=2219
Oppressor5:55Middle 50%: 5:13–6:43 · n=2098
Geothermal Powerplant8:07Middle 50%: 7:10–9:24 · n=1537
Advanced Metal Extractor9:24Middle 50%: 8:46–10:21 · n=1995

Played most by

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