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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 · 1973 distinct matches · 199 players · 80% of Cortex Geo sea games · team won 53% of 2286 · 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 1973 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 1:13 · 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 · 8 steps
    1. GraverobberGraverobber
    2. Construction BotCon bot ×3
    3. Mex
    4. Construction BotCon bot
    5. GraverobberGraverobber
    6. Mex ×2
    7. Radar TowerRadar Tower
    8. ShipyardShipyarddone 3:22 · 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 · 15 steps
    1. Con turret
    2. Construction ShipCon ship
    3. HerringMissile corvette
    4. Mex
    5. SupporterGunboat
    6. RiptideFrigatedone 4:05 · typical 4:40
    7. HerringMissile corvette
    8. GruntGruntfor Pond
    9. Mex
    10. OppressorDestroyerdone 5:21 · typical 5:55
    11. TrasherTrasher
    12. GruntGrunt
    13. GruntGruntfor Pond
    14. GuardGuard
    15. GruntGruntfor Pond
  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 · 90 steps
    1. GruntGrunt
    2. Construction BotCon bot
    3. Mex
    4. Geothermal PowerplantGeodone 10:55 · typical 8:07
    5. RiptideFrigate
    6. GraverobberGraverobber
    7. RiptideFrigate
    8. Mex
    9. Radar TowerRadar Tower
    10. RiptideFrigate
    11. Mex
    12. SeekerSeeker
    13. UrchinUrchin
    14. Mex ×2
    15. GuardGuard
    16. SeekerSeeker
    17. Radar TowerRadar Tower
    18. GruntGrunt
    19. Death CavalryDeath Cavalry
    20. GuardGuard
    21. GruntGrunt
    22. SupporterGunboat
    23. Mex
    24. HerringMissile corvette
    25. Death CavalryDeath Cavalry
    26. Mex
    27. OppressorDestroyer
    28. Advanced Metal ExtractorT2 mexdone 10:31 · typical 9:24
    29. Wind
    30. TrasherTrasher
    31. Mex
    32. Wind ×4
    33. UrchinUrchin
    34. Wind ×10
    35. OppressorDestroyer
    36. Wind ×11
    37. Construction BotCon bot
    38. Wind ×5
    39. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    40. OppressorDestroyer
    41. Wind
    42. Advanced Metal ExtractorT2 mex
    43. Con turret
    44. Wind ×2
    45. Construction BotCon bot
    46. Wind
    47. Energy storage
    48. UrchinUrchin
    49. Wind ×2
    50. Construction BotCon bot
    51. Death CavalryDeath Cavalry
    52. Wind
    53. Energy storage
    54. Wind
    55. Construction ShipCon ship
    56. Wind
    57. UrchinUrchin
    58. Construction ShipCon ship
    59. Advanced Metal ExtractorT2 mex
    60. GuardGuard
    61. Wind
    62. OppressorDestroyer
    63. Wind
    64. HerringMissile corvette ×2
    65. Wind
    66. OppressorDestroyer
    67. UrchinUrchin
    68. Wind
    69. UrchinUrchin
    70. OppressorDestroyer
    71. Wind
    72. Advanced Metal ExtractorT2 mex
    73. Construction ShipCon ship
    74. HerringMissile corvette
    75. Wind
    76. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    77. HerringMissile corvette
    78. Death CavalryDeath Cavalry
    79. UrchinUrchin
    80. Wind
    81. OppressorDestroyer
    82. Wind
    83. Advanced Metal ExtractorT2 mex
    84. Wind
    85. UrchinUrchin
    86. Advanced ShipyardAdvanced Shipyarddone 14:53
    87. Con turret
    88. Advanced Metal ExtractorT2 mex
    89. Mex
    90. Advanced Construction SubAdvanced Construction Sub

Counts are medians over the build's games: half of them build more, half fewer. The example game is arcsiz's (36 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 75% 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

2286 games.

Show as table
ByMetal produced: This buildEnemy metal destroyed: This buildOwn metal lost: This build
1:0039800
2:0092900
3:00156100
4:002865051
5:00406814652
6:005417440231
7:006894905526
8:0085781526891
9:001043024351321
10:001255834711987
11:001509046412760
12:001807260173623
13:002132772174344
14:002486384785190
15:002876897226201
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

arcsiz

36.1 OS · 15/10/2026

Open source match ↗

15 received units · includes a constructor
9 metal received · 62412 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=2259
Shipyard3:19Middle 50%: 3:02–3:37 · n=2277
Orca4:17Middle 50%: 3:52–4:59 · n=1543
Riptide4:40Middle 50%: 4:09–5:21 · n=2226
Oppressor5:55Middle 50%: 5:13–6:42 · n=2105
Geothermal Powerplant8:07Middle 50%: 7:10–9:25 · n=1542
Advanced Metal Extractor9:24Middle 50%: 8:46–10:21 · n=2003

Played most by

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