Build intricate rail networks, deploy and upgrade unique Battle Trains, and harness Turret Enchantments to forge mobile fortresses. Fend off endless abominations from the deep earth. Every layout is a battle of wits, every adjustment decides survival.

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Coming Soon To Early Access

The developers of this game intend to release as a work in progress, developing with the feedback of players.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“The core gameplay of Loopstructor 2: Skyspine—a dynamic, track-based tower defense system—offers deep strategic complexity and build variety. We believe our perspective as developers is limited. Through Early Access, we aim to invite our core community to join us on this development journey. Your direct feedback will be the most valuable guide for balancing, deepening gameplay, and polishing the overall experience. Our goal is to collaborate with the community to forge this into a truly engaging and surprising strategic Roguelike.”

Approximately how long will this game be in Early Access?

“We anticipate the Early Access period to last approximately 6 to 12 months. The exact duration will largely depend on the volume and quality of feedback we receive from the community, as well as the scale of additional content we plan to implement during this phase. Our primary goal is to ensure that the game reaches a state of content, balance, and stability at Version 1.0 that satisfies both us and our players.”

How is the full version planned to differ from the Early Access version?

“Compared to the Early Access version, our planned full release (v1.0) will include:
- Richer Content: More varieties of "Battle Trains," track "Enchantments," enemy types, boss encounters, and unlockable game modes or story chapters
- More Polished Systems: Thorough balance refinements based on player feedback, and potentially new core systems or mechanics
- Enhanced Experience: Comprehensive performance optimization, support for more control schemes (e.g., gamepads), and additional language localizations
- Greater Stability: Resolution of all major issues identified during Early Access for a smooth and stable experience
Our roadmap is flexible, and community input will directly influence the priority of new additions.”

What is the current state of the Early Access version?

“The current Early Access version features the complete core gameplay loop: players can freely design and build complex rail networks, deploy and upgrade multiple unique turrets and "Battle Trains," customize their defense strategy using a powerful "Enchantment" system, and face waves of minions and challenging bosses sent by the "Rail Gods." The game includes a full Roguelike progression system (e.g., meta-upgrades, random events, diverse build options) and offers several hours of initial replayable content. The foundational framework is stable, and we are ready to iterate and grow based on community collaboration.”

Will the game be priced differently during and after Early Access?

“Yes, we plan to appropriately increase the price when the game leaves Early Access and launches as Version 1.0.
This is to support the additional development costs incurred from the substantial content updates, system optimizations, and overall polish we commit to throughout the Early Access period. Players who purchase the game during Early Access will not only obtain it at a more favorable price but, more importantly, their support and feedback will directly help shape the game's future. We sincerely intend this as a way to reward our early supporters.”

How are you planning on involving the Community in your development process?

“The community is our core partner in development. We plan to maintain close communication through:
- Official Steam Forum & Discord Community & Reddit: These will be our primary hubs for direct interaction, feedback collection, and announcements
- Regular Development Blogs: Sharing progress transparently via Steam News and social media, including design challenges and future update plans
- Dedicated Feedback & Suggestion Channels: We encourage players to submit bug reports, balance suggestions, or new content ideas in designated sections. We will regularly review, categorize, and discuss this invaluable input
- Player Testing & Surveys: For major new systems or changes, we may invite active community members to closed tests or conduct community polls
Our commitment is to listen earnestly, respond actively, and give community voices significant weight in our development decisions.”
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Join the Loopstructor 2: Skyspine Playtest

Request access and you’ll get notified when the developer is ready for more participants.
This game is not yet available on Steam

Planned Release Date: June 2026

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About This Game

Loopstructor 2: Skyspine is a wasteland steampunk tower defense game. In the shattered world after The Sinking, you play as a Cohort Commander, tasked with eliminating ground-based abominations, reclaiming lost territory, and fighting for humanity's final aerial sanctuary.

Core Gameplay: Loop-based Tower Defense

Build intricate rail networks, deploy and upgrade unique Battle Trains, and harness the new Turret Enchantment system to transform your mobile fortresses into devastating engines of defense. Every decision matters, and every move could mean survival—or collapse.

Deep Strategy

A dynamically shifting battlefield with endless tactical combinations tests your planning and adaptability. 48 turret types, 10+ enchantments, and multiple upgrade paths—countless tactical builds await discovery.

High Replayability 

Unlock diverse turrets, unique bases, and powerful relics to craft your own tactical playstyle. Each run offers a new experience.

Moral Choice

When you unveil the dark truth behind the floating city, when absolute sincerity collides with inescapable original sin—

Hold fast to your convictions, or raise the banner of rebellion?

Add Loopstructor 2: Skyspine to your Steam Wishlist today! Prepare yourself for the mission ahead.

AI Generated Content Disclosure

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

Some of the multilingual descriptions on this page have been generated with AI assistance, and certain in-game text has also been proofread using AI tools.

System Requirements

Windows
macOS
SteamOS + Linux
    Minimum:
    • OS *: Windows 7 SP1 or newer
    • Processor: Dual Core 2.0 GHz or better
    • Memory: 16 GB RAM
    • Graphics: GTX 960 or higer
    • DirectX: Version 11
    • Network: Broadband Internet connection
    • Storage: 2 GB available space
* Starting January 1st, 2024, the Steam Client will only support Windows 10 and later versions.
    Minimum:
    • OS: macOS 10.12 (Sierra) or newer
    • Processor: M series
    • Memory: 8 GB RAM
    • Graphics: Intel HD Graphics 3000 or better, OpenGL 3.2+ support
    • Network: Broadband Internet connection
    • Storage: 2 GB available space
* Starting February 15, 2024, the Steam Client will no longer support 32-bit games or macOS 10.14 or lower.
    Minimum:
    • OS: Ubuntu 18.04 LTS or newer (SteamOS 3.0+)
    • Processor: Dual Core 2.0 GHz or better
    • Memory: 2 GB RAM
    • Graphics: OpenGL 3.2+ compatible GPU (512 MB VRAM)
    • Network: Broadband Internet connection
    • Storage: 2 GB available space
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