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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 1:05 · 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 · 18 steps
    1. Wind
    2. GraverobberGraverobber
    3. Wind
    4. GraverobberGraverobber
    5. Construction BotCon bot
    6. Wind ×2for Air
    7. GraverobberGraverobber
    8. Con turret
    9. Construction BotCon bot
    10. TrasherTrasher ×2
    11. Construction BotCon bot
    12. Mex
    13. Construction BotCon bot
    14. Mex
    15. GruntGrunt
    16. Energy storage
    17. GruntGrunt
    18. ShipyardShipyarddone 3:28 · 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 · 22 steps
    1. Converter
    2. Mex
    3. Converter ×2
    4. Radar TowerRadar Tower
    5. Construction ShipCon ship
    6. RiptideFrigatedone 3:53 · typical 4:11
    7. Mex
    8. UrchinUrchin
    9. RiptideFrigate
    10. Wind
    11. Radar TowerRadar Tower
    12. Mex
    13. RiptideFrigate
    14. Mex
    15. Wind
    16. ThistleThistle
    17. Radar TowerRadar Tower
    18. Wind
    19. ThistleThistle
    20. RiptideFrigate
    21. Mex
    22. ThistleThistle
  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 · 63 steps
    1. Wind
    2. GuardGuard
    3. OppressorDestroyerdone 5:43 · typical 6:10
    4. Mex
    5. ThistleThistle
    6. Wind
    7. GuardGuard
    8. HerringMissile corvette
    9. Wind
    10. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    11. Death CavalryDeath Cavalry
    12. Wind
    13. HerringMissile corvette
    14. OppressorDestroyer
    15. GuardGuard
    16. Mex ×2
    17. Wind
    18. GuardGuard
    19. Wind
    20. Death CavalryDeath Cavalry
    21. Con turret
    22. Advanced Metal ExtractorT2 mexdone 7:55
    23. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    24. ThistleThistle
    25. Mex
    26. Wind
    27. RiptideFrigate
    28. Wind
    29. ThistleThistle
    30. OrcaSubmarinedone 8:16 · typical 4:26
    31. Advanced Metal ExtractorT2 mex
    32. Wind
    33. ThistleThistle ×2
    34. Wind
    35. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    36. Wind ×4
    37. HerringMissile corvette
    38. Wind
    39. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    40. Advanced Metal ExtractorT2 mex
    41. Wind
    42. HerringMissile corvette
    43. Wind
    44. HerringMissile corvette
    45. Wind
    46. Death CavalryDeath Cavalry
    47. Wind
    48. Death CavalryDeath Cavalry
    49. Wind ×2
    50. HerringMissile corvette
    51. Wind
    52. Con turret
    53. OppressorDestroyer
    54. Con turret
    55. Wind
    56. RiptideFrigate
    57. Wind
    58. HerringMissile corvette
    59. Advanced Metal ExtractorT2 mex
    60. Wind
    61. Energy storage
    62. Construction ShipCon ship
    63. Wind ×2

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 ↗

6 received units · includes a constructor
501 metal received · 73549 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