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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 ×3
    3. Bot LabBot Labdone 1:04 · 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 · 24 steps
    1. Wind
    2. Construction BotCon bot
    3. TrasherTrasher
    4. Construction BotCon bot
    5. Wind ×2
    6. GraverobberGraverobber
    7. Wind
    8. GraverobberGraverobber
    9. Mex
    10. Construction BotCon bot
    11. Wind
    12. GruntGrunt
    13. Con turret
    14. GruntGrunt
    15. Construction BotCon bot
    16. GraverobberGraverobber
    17. Energy storage
    18. Mex
    19. Wind
    20. Bot LabEat Bot Labreclaimed for its metal
    21. JellyfishJellyfish
    22. Mex
    23. Wind
    24. ShipyardShipyarddone 4:22 · 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 · 3 steps
    1. Geothermal PowerplantGeodone 6:57 · typical 8:08
    2. Radar TowerRadar Tower
    3. OrcaSubmarinedone 5:13 · typical 4:18
  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 · 96 steps
    1. OppressorDestroyernot finished by 15:00 · typical 5:55
    2. RiptideFrigate ×2done 5:39 · typical 4:40
    3. Mex
    4. RiptideFrigate
    5. Construction ShipCon ship
    6. Mex
    7. Death CavalryDeath Cavalry
    8. HerringMissile corvette
    9. OppressorDestroyer
    10. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    11. Con turret
    12. Mex
    13. Converter
    14. Mex
    15. Advanced Metal ExtractorT2 mexdone 9:07 · typical 9:24
    16. Converter
    17. Mex
    18. Radar TowerRadar Tower
    19. RiptideFrigate ×2
    20. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    21. Converter
    22. Wind
    23. RiptideFrigate
    24. Converter
    25. RiptideFrigate
    26. Wind
    27. Death CavalryDeath Cavalry
    28. Wind
    29. HerringMissile corvette
    30. Converter
    31. OppressorDestroyer
    32. Advanced Metal ExtractorT2 mex
    33. Converter ×2
    34. RiptideFrigate ×2
    35. Converter
    36. RiptideFrigate
    37. Advanced Metal ExtractorT2 mex
    38. Death CavalryDeath Cavalry
    39. HerringMissile corvette
    40. OppressorDestroyer
    41. Converter
    42. Con turret
    43. Converter
    44. RiptideFrigate
    45. OppressorDestroyer
    46. Advanced Metal ExtractorT2 mex
    47. RiptideFrigate ×2
    48. Con turret
    49. Wind
    50. Death CavalryDeath Cavalry
    51. OppressorDestroyer
    52. Con turret
    53. Wind ×2
    54. OppressorDestroyer
    55. Wind ×3
    56. Advanced Metal ExtractorT2 mex
    57. RiptideFrigate
    58. HerringMissile corvette
    59. Wind ×2
    60. Mex
    61. Wind
    62. HerringMissile corvette
    63. Wind
    64. HerringMissile corvette
    65. Wind
    66. RiptideFrigate
    67. HerringMissile corvette
    68. Wind ×2
    69. RiptideFrigate
    70. Wind
    71. RiptideFrigate ×2
    72. Wind
    73. Death CavalryDeath Cavalry
    74. Wind
    75. Advanced Metal ExtractorT2 mex
    76. Wind
    77. OppressorDestroyer
    78. Wind ×5
    79. HerringMissile corvette
    80. Wind
    81. HerringMissile corvette
    82. Wind
    83. HerringMissile corvette
    84. Wind
    85. RiptideFrigate
    86. Wind ×2
    87. Construction ShipCon ship
    88. Con turret ×2
    89. Construction ShipCon ship
    90. Wind
    91. Advanced ShipyardAdvanced Shipyarddone 14:41
    92. Con turret
    93. Construction ShipCon ship ×2
    94. Con turret
    95. Wind
    96. Con turret ×2

Counts are medians over the build's games: half of them build more, half fewer. The example game is SkyFireEX's (41 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

SkyFireEX

41.3 OS · 15/10/2026

Open source match ↗

12 received units · includes a constructor
189 metal received · 105011 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
Standard geo sea · Cortex Geo sea build order · BAR Build Atlas