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Geo sea / Cortex / Economy first / OBSERVED BUILD

Standard geo sea

Cortex Geo sea build order · Supreme Isthmus

The role's default economy-first play: bot lab then shipyard in the cove, quick frigate/submarine/destroyer navy to contest sea and hold the coast, transitioning into whatever the sea fight needs.

Usually shipyard in the cove (98%)

#naval #eco · 977 distinct matches · 100 players · 83% of Cortex Geo sea games · team won 52% of 1096 · Recently observed

HOW TO PLAY IT

Key timing: Shipyard by 3:18

  1. Open 3 mex, wind and solar, then Bot Lab.
  2. Get a BP and costal torpedo launcher up before the Shipyard.
  3. Put up Shipyard once you can defend it.
  4. Push out "submarine" and "frigate" to contest the sea.
  5. Add geothermal to fund the fleet transition into "destroyer", "missile corvette".

Phase by phase

TYPICAL OF ITS 977 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 ~1:12, middle half 1:06–1:26

    Some games also: wind for allies (49%)

    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 1:03 · typical 1:12
  2. 2

    Bot Lab to Shipyard

    Economy
    • Metal Extractor1Mex
    • Wind Turbine2Wind
    Order
    1. ShipyardShipyard after 4 mex, 5 wind, 1 energy storagedone ~3:17, middle half 3:02–3:33
    Builders
    • Construction Bot3 Con bot
    • Graverobber2 Graverobber
    Army
    • Grunt1 Grunt

    Some games also: con turret (46%) · trasher (39%) · energy storage (34%) · wind for allies (32%)

    By 2:51 in all: 4 mex · 5 wind

    The example game in this phase · 15 steps
    1. Construction BotCon botfor Beach sea
    2. GraverobberGraverobber
    3. Wind ×3
    4. Construction BotCon bot
    5. Mex
    6. Wind ×2
    7. GraverobberGraverobber
    8. Construction BotCon bot
    9. GraverobberGraverobber
    10. GruntGrunt
    11. Mex
    12. GruntGrunt
    13. TrasherTrasher
    14. Mex
    15. ShipyardShipyarddone 3:25 · typical 3:17
  3. 3

    Shipyard to 5:00

    Economy
    • Metal Extractor4Mex
    Builders
    • Construction Ship1 Con ship
    Army
    • Riptide2 Frigate
    • Orca1 Submarine
    Other
    • Radar Tower1 Radar Tower

    Some games also: Guard (49%) · wind (48%) · missile corvette (48%) · destroyer (46%) · gunboat (40%)

    By 5:00 in all: 8 mex · 6 wind · 1 energy storage · 1 con turret

    The example game in this phase · 16 steps
    1. Energy storage
    2. Construction ShipCon ship
    3. GuardGuard
    4. Wind
    5. SupporterGunboat ×2
    6. Mex
    7. OrcaSubmarinedone 4:05 · typical 4:19
    8. Wind ×2
    9. Mex
    10. Wind ×2
    11. HerringMissile corvette
    12. RiptideFrigatedone 4:42 · typical 4:35
    13. Mex
    14. Wind ×2
    15. RiptideFrigate
    16. OrcaSubmarine
  4. 4

    5:00 to 10:00

    Economy
    • Metal Extractor2Mex
    • Wind Turbine8Wind
    • Energy Converter1Converter
    Builders
    • Construction Turret1 Con turret
    • Death Cavalry2 Death Cavalry
    • Construction Ship1 Con ship
    Army
    • Guard2 Guard
    • Riptide5 Frigate
    • Oppressor2 Destroyer
    Other
    • Naval Radar / Sonar Tower2 Naval Radar / Sonar Tower

    Some games also: geo (47%) · Thistle (40%) · submarine (34%)

    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 · 61 steps
    1. OrcaSubmarine
    2. RiptideFrigate
    3. Radar TowerRadar Tower
    4. RiptideFrigate
    5. GuardGuard
    6. ThistleThistle
    7. Death CavalryDeath Cavalry
    8. Construction ShipCon ship
    9. Mex
    10. Geothermal PowerplantGeodone 9:14 · typical 7:59
    11. Advanced Metal ExtractorT2 mexdone 9:24 · typical 9:22
    12. OrcaSubmarine ×2
    13. Mex
    14. Converter
    15. HerringMissile corvette
    16. Converter
    17. UrchinUrchin
    18. ThistleThistle
    19. Light MineLight Mine
    20. HerringMissile corvette ×3
    21. Light MineLight Mine
    22. Advanced Metal ExtractorT2 mex
    23. Light MineLight Mine ×2
    24. ShipyardShipyarddone 9:54
    25. Light MineLight Mine
    26. Mex
    27. Light MineLight Mine ×6
    28. Bot LabBot Labdone 10:33
    29. Light MineLight Mine ×2
    30. Advanced Metal ExtractorT2 mex
    31. Light MineLight Mine ×2
    32. Construction BotCon bot
    33. Light MineLight Mine ×2
    34. Construction BotCon bot
    35. Light MineLight Mine ×2
    36. Mex
    37. Construction BotCon bot
    38. Construction ShipCon ship
    39. Light MineLight Mine
    40. Con turret
    41. RiptideFrigate
    42. Naval Construction Turret
    43. Advanced Metal ExtractorT2 mex
    44. Naval Construction Turret
    45. OrcaSubmarine
    46. Naval Construction Turret
    47. Radar TowerRadar Tower
    48. RiptideFrigate
    49. Advanced Metal ExtractorT2 mex
    50. UrchinUrchin
    51. OrcaSubmarine
    52. RiptideFrigate
    53. Advanced ShipyardAdvanced Shipyarddone 13:29
    54. Advanced Metal ExtractorT2 mex
    55. Naval Construction Turret
    56. Advanced Construction SubAdvanced Construction Sub
    57. BuccaneerCruiserdone 14:13
    58. Naval Advanced Metal ExtractorNaval Advanced Metal Extractordone 14:34
    59. Advanced Geothermal PowerplantAdvanced Geothermal Powerplantnot finished by 15:00
    60. PathfinderPathfinder
    61. Naval Advanced Metal ExtractorNaval Advanced Metal Extractor

Counts are medians over the build's games: half of them build more, half fewer. The example game is [FFS]WatchBehind's (38 OS, 09/08/2026); pick another.

Team trades

IN AT LEAST 30% OF ITS GAMES

You hand over

  • Wind Turbine2 Wind to Airfirst at 1:48 · in 72% of games

You get

  • Finch1 Finch from Airfirst at 1:51 · in 83% of games
  • Hercules1 Light transport from Airfirst at 2:00 · in 75% of games
  • Advanced Construction Bot1 T2 con bot from Techfirst at 7:44 · in 89% 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

1096 games.

Show as table
ByMetal produced: This buildEnemy metal destroyed: This buildOwn metal lost: This build
1:0039700
2:0092800
3:00156700
4:002900051
5:00410913152
6:005464441241
7:006946931551
8:0086111570903
9:001049024561351
10:001261036252061
11:001521848802898
12:001811663973757
13:002141473914448
14:002501386465363
15:002878197446294
WHAT THE NUMBERS SAY

Standard Cortex geo sea sits at an even 50% win rate, trading a slower start for a big resource lead by 15:00.

  • + Metal produced hits 28451 by 15:00, well above both front roles
  • + Own metal lost stays far below enemy metal destroyed at every checkpoint
  • − Only 50% team win rate, the lowest of these six builds
  • − T2 factory only completes in 40% of games by 12:53
THE EXAMPLE YOU ARE READING

[FFS]WatchBehind

37.9 OS · 09/08/2026

Open source match ↗

3 received units · includes a constructor
654 metal received · 23842 energy received

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

Typical milestones

Bot Lab1:12Middle 50%: 1:06–1:26 · n=1085
Shipyard3:17Middle 50%: 3:02–3:33 · n=1090
Orca4:19Middle 50%: 3:54–5:00 · n=755
Riptide4:35Middle 50%: 4:08–5:21 · n=1064
Oppressor5:51Middle 50%: 5:08–6:35 · n=992
Geothermal Powerplant7:59Middle 50%: 7:01–9:00 · n=655
Advanced Metal Extractor9:22Middle 50%: 8:45–10:10 · n=940

Played most by

sirniho122games of this buildSHOGVN92games of this buildOptimusprimenutt84games of this buildPRO_Rerory47games of this buildhihimik41games of this build