Build and defend a space colony where every unit of power and every crew assignment matters. Expand production, research new technologies, shape the battlefield with walls and weapons, and adapt your strategy against alien swarms across nine campaign operations.

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About This Game

EVERY COLONY HAS A BREAKING POINT

Stelvyr: Colony Defense is a colony-building and defense strategy game set on a hostile planetary frontier. Every structure, crew member, and unit of power can determine whether your colony survives.

Establish production, route a limited power supply, deploy specialist crew, and shape your defenses before alien swarms attack from multiple directions. When the battlefield changes, your strategy must change with it—no single defensive plan can win every operation.

BUILD A COLONY THAT ACTUALLY WORKS

  • Manage critical resources — Produce Minerals, balance Power, and maintain enough Crew to keep essential systems operational.

  • Command physical crew — Engineers, Gunners, Scientists, and Xenobiologists travel to their assignments, repair damage, rescue casualties, and risk their lives in the field.

  • Shape the battlefield — Combine walls, gates, turrets, mines, and orbital weapons to create defensive lines suited to each approach.

  • Choose your discoveries — Research technologies that transform your economy, power grid, and combat capabilities.

READ THE BATTLEFIELD. ADAPT THE COLONY

Every hostile species plays a different role. Some assault the colony directly, while others break fortifications, sabotage the power grid, support nearby swarms, or pressure vital infrastructure.

Orbital conditions, mission events, and adaptive reinforcements punish static plans. Monitor the radar, study incoming waves, reposition crew, reroute power, and reinforce weaknesses before they become disasters.

NINE OPERATIONS. THREE DIFFICULTY LEVELS

Fight through nine campaign operations, each with its own rules, starting conditions, strategic objectives, and signature threats.

  • Cadet — Learn the colony systems and experiment with different defensive strategies.

  • Commander — Balance expansion, research, staffing, and defense under sustained pressure.

  • Veteran — Face tighter resources, more dangerous enemies, and consequences that leave little room for error.

Build. Plan. Adapt. Hold the colony until the final wave.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Generative AI tools were used during development for limited coding assistance and as a starting point for some 3D assets. All AI-assisted content was reviewed, modified, and integrated by the developer. No generative AI is used during gameplay.

System Requirements

    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10 64-bit (version 21H1 or newer)
    • Processor: Intel Core i5-8400 or AMD Ryzen 5 2600
    • Memory: 8 GB RAM
    • Graphics: NVIDIA GeForce GTX 1060 6 GB or AMD Radeon RX 580 8 GB
    • DirectX: Version 11
    • Storage: 4 GB available space
    • Sound Card: DirectX-compatible sound device
    • Additional Notes: Requires a 64-bit processor and operating system. Target: 1920x1080 at 30 FPS using Low quality settings.
    Recommended:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10/11 64-bit
    • Processor: Intel Core i5-10400 or AMD Ryzen 5 3600
    • Memory: 16 GB RAM
    • Graphics: NVIDIA GeForce GTX 1660 SUPER 6 GB or AMD Radeon RX 5600 XT 6 GB
    • DirectX: Version 11
    • Storage: 4 GB available space
    • Sound Card: DirectX-compatible sound device
    • Additional Notes: SSD recommended. Target: 1920x1080 at 60 FPS using High quality settings.
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