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Beach sea / Cortex / Economy first / OBSERVED BUILD

Standard beach sea

Cortex Beach sea build order · Supreme Isthmus

The role's usual play: com goes to sea to build a shipyard around 2 minutes, pumping frigates and destroyers to contest enemy sea entry or hold vision, with an advanced metal extractor around 10 minutes as the transition into the team's…

Usually shipyard first (93%)

#naval #eco · 1589 distinct matches · 207 players · 84% of Cortex Beach sea games · team won 55% of 1793 · Recently observed

HOW TO PLAY IT

Key timing: Shipyard by 1:56

  1. Open 3 mex, then send com to sea to build Shipyard by 1:56.
  2. Add tidal generators, wind and more mex to fund the shipyard.
  3. Pump Riptide first, then Oppressor to contest enemy sea entry.
  4. Get T2 constructor out to start scaling the naval economy.
  5. Transition into Advanced Metal Extractor as the economy phase begins.

Phase by phase

TYPICAL OF ITS 1589 GAMES
  1. 1
  2. 2
  3. 3
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 Shipyard

    Economy
    • Metal Extractor3Mex
    • Wind Turbine3Windfor allies
    • Wind Turbine2Wind
    • Energy Storage1Energy storage
    Order
    1. ShipyardShipyard after 3 mex, 2 wind, 1 energy storagedone ~1:56, middle half 1:43–2:07

    Some games also: Guard (30%)

    By 1:39 in all: 3 mex · 2 wind · 1 energy storage

    The example game in this phase · 3 steps
    1. Mex ×3
    2. Tidal ×3
    3. ShipyardShipyarddone 1:48 · typical 1:56
  2. 2

    Shipyard to 5:00

    Economy
    • Metal Extractor5Mex
    • Tidal Generator2Tidal
    Builders
    • Construction Ship2 Con ship
    Army
    • Riptide2 Frigate
    • Herring1 Missile corvette
    • Oppressor1 Destroyer
    Other
    • Naval Radar / Sonar Tower1 Naval Radar / Sonar Tower

    Some games also: Urchin (46%) · mex (38%) · wind (37%) · submarine (36%) · wind (36%)

    By 5:00 in all: 8 mex · 3 wind · 2 tidal · 1 energy storage

    The example game in this phase · 12 steps
    1. Construction ShipCon ship
    2. HerringMissile corvette
    3. RiptideFrigatedone 2:28 · typical 3:50
    4. Mex
    5. OppressorDestroyerdone 3:31 · typical 5:15
    6. Mex
    7. Construction ShipCon ship
    8. Mex ×2
    9. Construction ShipCon ship
    10. OppressorDestroyer
    11. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    12. Tidal
  3. 3

    5:00 to 10:00

    Economy
    • Metal Extractor1Mex
    • Wind Turbine8Wind
    Builders
    • Construction Ship1 Con ship
    • Death Cavalry1 Death Cavalry
    Army
    • Urchin1 Urchin
    • Riptide5 Frigate
    • Oppressor2 Destroyer
    • Herring2 Missile corvette
    Other
    • Naval Radar / Sonar Tower1 Naval Radar / Sonar Tower

    Some games also: Naval Construction Turret (49%) · Guard (47%) · tidal (39%) · Radar Tower (39%) · wind (34%)

    By 10:00 in all: 9 mex · 10 wind · 4 wind · 4 tidal · 1 energy storage · 1 Naval Construction Turret

    The example game in this phase · 77 steps
    1. Tidal
    2. RiptideFrigate
    3. Death CavalryDeath Cavalry
    4. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    5. Tidal
    6. RiptideFrigate
    7. Tidal
    8. RiptideFrigate
    9. Tidal
    10. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    11. RiptideFrigate
    12. Tidal
    13. RiptideFrigate
    14. Tidal
    15. RiptideFrigate
    16. Tidal
    17. Advanced Metal ExtractorT2 mexdone 9:22 · typical 9:58
    18. RiptideFrigate
    19. Tidal
    20. RiptideFrigate
    21. Tidal
    22. Mex
    23. RiptideFrigate
    24. Tidal
    25. Death CavalryDeath Cavalry
    26. Tidal
    27. Naval Radar / Sonar TowerNaval Radar / Sonar Tower
    28. HerringMissile corvette ×2
    29. Tidal
    30. Advanced Metal ExtractorT2 mex
    31. OppressorDestroyer
    32. Tidal ×2
    33. OppressorDestroyer
    34. Tidal ×3
    35. Advanced Metal ExtractorT2 mex
    36. Tidal
    37. Construction ShipCon ship
    38. Tidal
    39. Death CavalryDeath Cavalry
    40. Tidal ×2
    41. RiptideFrigate
    42. Tidal
    43. RiptideFrigate
    44. Tidal
    45. RiptideFrigate
    46. Tidal
    47. RiptideFrigate
    48. Tidal
    49. RiptideFrigate
    50. Tidal
    51. HerringMissile corvette ×2
    52. Tidal ×2
    53. HerringMissile corvette
    54. RiptideFrigate
    55. Advanced Metal ExtractorT2 mex
    56. Tidal
    57. RiptideFrigate
    58. Tidal
    59. RiptideFrigate ×2
    60. Tidal
    61. RiptideFrigate
    62. Tidal
    63. RiptideFrigate
    64. Tidal
    65. RiptideFrigate
    66. Tidal
    67. RiptideFrigate
    68. Tidal
    69. Death CavalryDeath Cavalry ×2
    70. Tidal ×2
    71. OppressorDestroyer
    72. Tidal ×2
    73. OppressorDestroyer
    74. Tidal ×2
    75. RiptideFrigate
    76. OppressorDestroyer
    77. Tidal

Counts are medians over the build's games: half of them build more, half fewer. The example game is [Grump]FranzDK's (31 OS, 12/08/2026); pick another.

Team trades

IN AT LEAST 30% OF ITS GAMES

You hand over

  • Wind Turbine3 Wind to Airfirst at 1:46 · in 77% of games

You get

  • Finch1 Finch from Airfirst at 2:00 · in 80% of games
  • Lazarus1 Lazarus from Geofirst at 2:13 · in 63% of games
  • Hephaestus1 Heavy transport from Airfirst at 2:16 · in 64% of games
  • Construction Bot1 Con bot from Geofirst at 2:26 · in 70% of games
  • Hercules1 Light transport from Airfirst at 2:34 · in 32% of games
  • Advanced Construction Bot1 T2 con bot from Techfirst at 8:08 · 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

1793 games.

Show as table
ByMetal produced: This buildEnemy metal destroyed: This buildOwn metal lost: This build
1:0040300
2:0093700
3:00155300
4:002540051
5:003716176101
6:005045487280
7:006492972592
8:00807016651001
9:00967926141532
10:001153637242325
11:001368547443105
12:001625058553875
13:001895168784645
14:002167379245691
15:002456588566520
WHAT THE NUMBERS SAY

Standard Beach sea play has the lowest team win rate of these builds and destroys far less enemy metal early than it loses eco time.

  • + Metal produced climbs to 24945 by 15:00, the highest of all six roles.
  • + Riptide and Oppressor together make 63% of army, a focused naval composition.
  • − Enemy metal destroyed is only 200 by 5:00, barely contesting early sea.
  • − T2 factory only reached in 35% of games, behind other roles' T2 timing.
THE EXAMPLE YOU ARE READING

[Grump]FranzDK

31.1 OS · 12/08/2026

Open source match ↗

5 received units · includes a constructor
137 metal received · 3330 energy received

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

Typical milestones

Shipyard1:56Middle 50%: 1:43–2:07 · n=1790
Riptide3:50Middle 50%: 3:12–4:34 · n=1747
Oppressor5:15Middle 50%: 4:29–6:06 · n=1726
Advanced Metal Extractor9:58Middle 50%: 9:17–10:54 · n=1517

Played most by

EpicTyrannus120games of this buildDamsko69games of this buildKbot_my_Ahole67games of this buildWaboum64games of this buildPRO_HYDRA63games of this build