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Geo sea / Cortex / Economy first / OBSERVED BUILD

Standard geo sea

Bot Lab then Shipyard by roughly 3:20 with a frigate and submarine out fast to contest the sea, transitioning into destroyers and later flagships/frigates for the rest of the game.

Usually no shipyard (100%)

#naval #eco · 5 distinct matches · 4 players · 100% of Cortex Geo sea games · team won 4 of 6 · Recently observed

HOW TO PLAY IT

Key timing: Shipyard by 3:20

  1. Take mex and wind, then build a Bot Lab by 1:06.
  2. Add a costal torpedo launcher before finishing the Shipyard.
  3. Complete the Shipyard to start pushing out ships.
  4. Push frigate and submarine out to contest the sea.
  5. Add destroyer to establish sea control, then scale toward T2.

Phase by phase

TYPICAL OF ITS 5 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
    Order
    1. Bot LabBot Lab after 3 mex, 3 winddone ~1:06, middle half 1:05–1:06

    By 0:49 in all: 3 mex · 3 wind

    The example game in this phase · 5 steps
    1. Mex ×2
    2. Wind
    3. Mex
    4. Wind ×2
    5. Bot LabBot Labdone 1:06 · typical 1:06
  2. 2

    Bot Lab to Shipyard

    Economy
    • Metal Extractor2Mex
    • Wind Turbine2Wind
    • Wind Turbine1Windfor allies
    • Energy Storage1Energy storage
    Order
    1. ShipyardShipyard after 5 mex, 5 wind, 1 con turretdone ~3:20, middle half 3:12–3:33
    Builders
    • Construction Turret1 Con turret
    • Construction Bot4 Con bot
    • Graverobber3 Graverobber
    Army
    • Trasher2 Trasher

    Some games also: grunt (50%)

    By 2:44 in all: 5 mex · 5 wind · 1 energy storage · 1 con turret

    The example game in this phase · 15 steps
    1. Wind
    2. GraverobberGraverobber ×2
    3. Wind
    4. Windfor Air
    5. Construction BotCon bot
    6. Windfor Air
    7. GraverobberGraverobber
    8. Con turret
    9. Construction BotCon bot
    10. TrasherTrasher ×2
    11. Converter
    12. Construction BotCon bot
    13. Mex
    14. Converter
    15. ShipyardShipyarddone 3:12 · typical 3:20
  3. 3

    Shipyard to 5:00

    Economy
    • Metal Extractor6Mex
    • Wind Turbine2Wind
    • Energy Converter3Converter
    Builders
    • Construction Ship1 Con ship
    Army
    • Thistle1 Thistle
    • Riptide2 Frigate
    • Orca1 Submarine
    Other
    • Radar Tower2 Radar Tower

    Some games also: missile corvette (50%) · Guard (33%) · Urchin (33%)

    By 5:00 in all: 10 mex · 8 wind · 4 converter · 1 energy storage · 1 con turret

    The example game in this phase · 29 steps
    1. Construction BotCon bot
    2. GruntGrunt ×2
    3. Mex
    4. Energy storage
    5. Radar TowerRadar Tower
    6. Construction ShipCon ship
    7. Mex
    8. Wind
    9. Converter
    10. OrcaSubmarinedone 4:04 · typical 4:26
    11. Converter
    12. Mex
    13. Wind
    14. Mex
    15. Radar TowerRadar Tower
    16. RiptideFrigatedone 4:43 · typical 4:11
    17. Wind
    18. Radar TowerRadar Tower
    19. ThistleThistle
    20. Mex
    21. ThistleThistle
    22. Wind
    23. Mex
    24. GuardGuard
    25. Mex
    26. RiptideFrigate
    27. ThistleThistle
    28. GuardGuard
    29. Wind
  4. 4

    5:00 to 10:00

    Economy
    • Metal Extractor5Mex
    • Wind Turbine12Wind
    Builders
    • Construction Turret3 Con turret
    • Death Cavalry2 Death Cavalry
    • Construction Ship2 Con ship
    Army
    • Guard7 Guard
    • Thistle4 Thistle
    • Herring4 Missile corvette
    • Riptide3 Frigate
    Other
    • Naval Radar / Sonar Tower3 Naval Radar / Sonar Tower

    Some games also: submarine (33%) · Slingshot (33%)

    By 10:00 in all: 15 mex · 20 wind · 4 converter · 1 energy storage · 4 con turret

    The example game in this phase · 84 steps
    1. GuardGuard ×2
    2. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    3. Wind
    4. ThistleThistle
    5. OppressorDestroyerdone 6:10 · typical 6:10
    6. Wind
    7. GuardGuard ×2
    8. HerringMissile corvette
    9. GuardGuard
    10. Wind
    11. Death CavalryDeath Cavalry
    12. RiptideFrigate
    13. Wind
    14. GuardGuard
    15. Construction ShipCon ship
    16. Mex
    17. Death CavalryDeath Cavalry
    18. GuardGuard
    19. Mex
    20. Wind
    21. EllysawFrigate
    22. Death CavalryDeath Cavalry
    23. GuardGuard
    24. Wind
    25. Mex
    26. Death CavalryDeath Cavalry
    27. Mex
    28. Death CavalryDeath Cavalry
    29. Wind
    30. Construction ShipCon ship
    31. GuardGuard
    32. OppressorDestroyer
    33. Wind
    34. RiptideFrigate
    35. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    36. EllysawFrigate
    37. Wind
    38. Death CavalryDeath Cavalry
    39. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    40. Mex
    41. Death CavalryDeath Cavalry
    42. Wind
    43. EllysawFrigate
    44. HerringMissile corvette ×2
    45. Wind
    46. EllysawFrigate
    47. HerringMissile corvette
    48. Wind
    49. Con turret
    50. Construction ShipCon ship
    51. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    52. Naval Metal Storage
    53. Wind
    54. Con turret ×2
    55. OppressorDestroyer
    56. Wind ×2
    57. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    58. Mex
    59. Wind ×5
    60. UrchinUrchin
    61. Wind ×9
    62. Mex
    63. Wind ×4
    64. Construction ShipCon ship
    65. Bot LabBot Labdone 11:33
    66. Twin GuardTwin Guard
    67. UrchinUrchin
    68. GruntGrunt ×2
    69. Wind
    70. UrchinUrchin
    71. GruntGrunt ×5
    72. UrchinUrchin
    73. Advanced ShipyardAdvanced Shipyarddone 12:19 · typical 11:48
    74. GruntGrunt
    75. Con turret
    76. GruntGrunt
    77. UrchinUrchin
    78. Wind
    79. GruntGrunt ×3
    80. Advanced Construction SubAdvanced Construction Sub
    81. Wind
    82. Mex
    83. Advanced Construction SubAdvanced Construction Sub
    84. Wind

Counts are medians over the build's games: half of them build more, half fewer. The example game is sirniho's (37 OS, 18/09/2026); pick another.

Team trades

IN AT LEAST 30% OF ITS GAMES

You hand over

  • Wind Turbine2 Wind to Airfirst at 2:15 · in 67% of games

You get

  • Hercules1 Light transport from Airfirst at 2:03 · in 83% of games
  • Finch1 Finch from Airfirst at 2:14 · in 83% of games
  • Advanced Construction Bot1 T2 con bot from Techfirst at 7:28 · in 33% of games
  • Advanced Construction Bot1 T2 con bot from Techfirst at 8:35 · in 33% 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

02k4k6k
0:005:0010:0015:00

metal

6 games.

Show as table
ByMetal produced: This buildEnemy metal destroyed: This buildOwn metal lost: This build
1:0039100
2:0092900
3:00174300
4:00306700
5:00441034851
6:006221816221
7:0082192088791
8:001035423931106
9:001253232321196
10:001518344012986
11:001852366413191
12:002044572134326
13:002206792664721
14:002206793314721
15:002206793814721
WHAT THE NUMBERS SAY

Standard Geo sea wins 67% of games and destroys far more metal than it loses by 15:00, showing strong sea dominance.

  • + Enemy metal destroyed reaches 9381 by 15:00 against 4721 lost.
  • − Own metal lost jumps from 51 at 5:00 to 2986 by 10:00, a rough mid-game spike.
THE EXAMPLE YOU ARE READING

sirniho

37.2 OS · 18/09/2026

Open source match ↗

2 received units
1136 metal received · 57897 energy received

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

Typical milestones

Bot Lab1:06Middle 50%: 1:05–1:06 · n=5
Shipyard3:20Middle 50%: 3:12–3:33 · n=6
Riptide4:11Middle 50%: 3:49–4:39 · n=6
Orca4:26Middle 50%: 4:12–4:26 · n=5
Oppressor6:10Middle 50%: 5:43–6:26 · n=5
Advanced Shipyard11:48Middle 50%: 11:18–12:04 · n=3

Played most by

sirniho3games of this build[APM]Zeeburg1game of this build[Grump]Grumpiness1game of this buildPRO_Fiddler1121game of this build

Supporting games

Pick a game to read and play it above.

[Grump]Grumpiness21/09/2026 · 49 OS↗sirniho18/09/2026 · 37 OS↗sirniho18/09/2026 · 37 OS↗sirniho18/09/2026 · 37 OS↗[APM]Zeeburg25/08/2026 · 43 OS↗PRO_Fiddler11225/08/2026 · 60 OS↗Supreme Isthmus v1.7
Beyond All Reason test-31320-e17e8b7
Naval balance tweaks off