Grey Line Interactive LLC

We build the future of interactive.

Novel software, immersive games, and the engines that power them. Designed from scratch, built to last.

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About Us

Building at the Edge

Grey Line Interactive LLC is a software company based in Meridian, Idaho. We create products that sit at the intersection of technology and experience, specializing in SaaS platforms, video games, and custom game engine development.

We work across the full stack of interactive software, from low-level engine architecture to polished user-facing applications. Every product we ship is built with intention, engineered for performance, and designed to solve real problems in ways that feel new.

SaaS Platforms
Games Interactive
Engines Core Tech
Idaho Based In
What We Build

Three Domains, One Standard

We focus on three categories of interactive software, each demanding its own discipline and craft.

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Software & SaaS

Web and cloud applications built for scale. We design platforms that handle complexity with clean interfaces and robust backends, serving users who need tools that just work.

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Games

Interactive experiences across genres and platforms. From concept through launch, we handle design, development, and everything between. Games that play as good as they look.

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Game Engines

Custom engine development for teams that need more than off-the-shelf solutions provide. Rendering pipelines, physics systems, toolchains, and runtime environments built for specific goals.

Atmospheric Horror

MORROWTAPE

Every dead line rings somewhere. A first-person psychological horror game coming to Steam for Windows and macOS.

MORROWTAPE key art showing a handheld receiver, red recording reels, and The Listener in a condemned telephone exchange.

Beneath a condemned 1989 telephone archive, twelve impossible calls are ringing again. Tune exact carrier frequencies, recover the red-spooled evidence, and reach the service lift before The Listener follows your noise. After every extraction, decide which testimony the city is allowed to remember.

The handheld receiver tuned to PEAK beside a red-spooled evidence tape.
Tune an exact carrier to PEAK and recover the evidence.
The Listener approaching through a dark corridor while the receiver is raised.
Every sound gives The Listener somewhere to search.
The archive review offering Preserve Originals and Erase Carrier choices.
Choose the official record after every extraction.
More About MORROWTAPE Wishlist on Steam
Retro Horror Platformer

WICKLING

A cheerful 8-bit kingdom with a candle for a head and something wrong underneath. Coming to Steam for Windows and macOS.

WICKLING key art: a small figure with a lit candle for a head, and a tall pale shape standing behind him in a dark meadow.

It plays exactly like the platformers you grew up with: world maps, power-up suits, fortresses, airships, end-of-level cards. Then every one of those systems turns a few degrees toward dread. The level timer is the wax of your own candle. Every death leaves a grave on the map that never goes away. And there is a tall, pale thing in the background of certain levels that only moves while you are facing away from it.

A bright green meadow under a smiling sun, with a tall grey figure standing motionless among the hills.
World 1. It is standing there. It does not do anything.
A dark level lit only by a candle, with large pale hands reaching in from the edges of the screen.
Later, it does.
A level almost entirely in darkness, with a small circle of light around the player's candle.
The timer is your candle. This is running out of it.
More About WICKLING Wishlist on Steam
Philosophy

How We Work

We believe the best software comes from small, focused teams that own their work end to end. We do not chase trends. We pick hard problems, study them deeply, and build solutions that are genuinely novel.

Every project at Grey Line Interactive starts with a question: what would this look like if we built it right? That means no shortcuts on architecture, no compromises on user experience, and no shipping before it is ready.

Our name reflects where we operate: the grey line between what exists and what is possible. That space is where the most interesting work happens.

We value clarity in code and in communication. Our products are documented, our systems are observable, and our interfaces are intuitive. Complexity lives under the hood, never in the user's way.

Based in Meridian, Idaho, we work with a mindset that combines the intensity of a startup with the patience of a studio. We are here to build things that matter and that last.

Contact

Start a Conversation

Have a project in mind or want to learn more? Reach out.

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Email
hello@greylineinteractive.com
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Headquarters
Meridian, Idaho, United States
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General Inquiries
info@greylineinteractive.com
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Web
greylineinteractive.com