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Geo sea / Cortex / Economy first / OBSERVED BUILD

Standard geo sea

Cortex Geo sea build order · Supreme Isthmus

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 · 3 steps
    1. Mex ×3
    2. Wind ×4
    3. Bot LabBot Labdone 1:09 · 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 · 13 steps
    1. Wind
    2. GraverobberGraverobber
    3. Wind ×3
    4. GraverobberGraverobber
    5. Wind
    6. Construction BotCon bot ×3
    7. Mex
    8. Construction BotCon bot
    9. Wind ×2
    10. Con turret
    11. Mex
    12. ThistleThistle
    13. ShipyardShipyarddone 3:35 · 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 · 13 steps
    1. Mex
    2. RiptideFrigatedone 3:48 · typical 4:11
    3. Mex
    4. RiptideFrigate
    5. Construction ShipCon ship
    6. Mex
    7. HerringMissile corvette
    8. Mex
    9. RiptideFrigate
    10. Geothermal PowerplantGeodone 5:46
    11. Mex ×2
    12. RiptideFrigate
    13. Mex
  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 · 103 steps
    1. ThistleThistle
    2. GuardGuard
    3. OppressorDestroyerdone 6:26 · typical 6:10
    4. ThistleThistle
    5. GuardGuard
    6. ThistleThistle
    7. Mex
    8. ThistleThistle
    9. Mex
    10. GuardGuard ×3
    11. RiptideFrigate
    12. GuardGuard ×3
    13. RiptideFrigate
    14. Mex
    15. GuardGuard ×2
    16. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    17. Construction ShipCon ship
    18. Con turret
    19. SlingshotSlingshot
    20. Con turret
    21. Naval Energy Storage
    22. HerringMissile corvette ×2
    23. GuardGuard
    24. HerringMissile corvette
    25. Advanced Metal ExtractorT2 mexdone 9:11
    26. HerringMissile corvette
    27. RiptideFrigate ×2
    28. OppressorDestroyer
    29. RiptideFrigate ×2
    30. Advanced Metal ExtractorT2 mex
    31. Construction ShipCon ship
    32. HerringMissile corvette
    33. RiptideFrigate
    34. Advanced Metal ExtractorT2 mex
    35. RiptideFrigate
    36. OppressorDestroyer
    37. RiptideFrigate ×2
    38. Construction ShipCon ship
    39. Naval Construction Turret
    40. HerringMissile corvette
    41. Naval Construction Turret
    42. Advanced Metal ExtractorT2 mex
    43. RiptideFrigate
    44. Naval Construction Turret
    45. Tidal ×6
    46. Naval Metal Storage
    47. Tidal ×2
    48. Advanced ShipyardAdvanced Shipyarddone 11:48 · typical 11:48
    49. Tidal
    50. Advanced Metal ExtractorT2 mex
    51. Tidal ×3
    52. Advanced Construction SubAdvanced Construction Sub
    53. Tidal ×2
    54. PathfinderPathfinder
    55. Tidal
    56. PathfinderPathfinder
    57. Tidal
    58. PathfinderPathfinder
    59. Tidal
    60. PathfinderPathfinder
    61. Tidal
    62. Advanced Metal ExtractorT2 mex
    63. PathfinderPathfinder
    64. Tidal
    65. BuccaneerCruisernot finished by 15:00
    66. Tidal
    67. BrimstoneAnti-swarm shipdone 12:47
    68. Tidal
    69. BrimstoneAnti-swarm ship
    70. Tidal ×2
    71. BrimstoneAnti-swarm ship
    72. Tidal
    73. BrimstoneAnti-swarm ship
    74. Advanced Metal ExtractorT2 mex
    75. Naval Advanced Metal ExtractorNaval Advanced Metal Extractordone 13:49
    76. BrimstoneAnti-swarm ship
    77. Tidal ×2
    78. PathfinderPathfinder
    79. Tidal
    80. PathfinderPathfinder ×2
    81. Tidal ×2
    82. PathfinderPathfinder
    83. Tidal
    84. PathfinderPathfinder
    85. Tidal ×2
    86. PathfinderPathfinder
    87. Tidal
    88. PathfinderPathfinder
    89. Naval Advanced Metal ExtractorNaval Advanced Metal Extractor
    90. Tidal
    91. PathfinderPathfinder
    92. Tidal
    93. PathfinderPathfinder ×2
    94. Tidal ×2
    95. PathfinderPathfinder
    96. Naval Metal Storage
    97. PathfinderPathfinder
    98. Tidal
    99. PathfinderPathfinder
    100. Tidal
    101. PathfinderPathfinder ×2
    102. Tidal
    103. Advanced Geothermal PowerplantAdvanced Geothermal Powerplantnot finished by 15:00

Counts are medians over the build's games: half of them build more, half fewer. The example game is [Grump]Grumpiness's (49 OS, 21/09/2026); 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

[Grump]Grumpiness

48.6 OS · 21/09/2026

Open source match ↗

8 received units · includes a constructor
84 metal received · 3699 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-31368-8379d65
Naval balance tweaks off