Game studio · Seoul · Est. 2026

Beautiful worlds,
built with AI.

Arumy is a founder-led game studio in Seoul, Korea. Claude by Anthropic leads our development — from game design and UI to QA and operations — and Codex by OpenAI shares the coding. Our first title, Soul Heroes, enters closed beta on Android in late October 2026.

Discover Soul Heroes How we build

Lead development Claude · AnthropicCoding partner Codex · OpenAI

Founded: Sep 22, 2026Sole proprietorship
Based in: Seoul, KoreaGangdong-gu
First title: Soul HeroesCollectible idle RPG
Closed beta: Late Oct 2026Android

The Studio

A beautiful world, held in both arms.

Arumy (아루미) comes from the Korean word areum. It is the areum in areumdapda, “beautiful,” and in han areum, “an armful” — as much as you can hold in both arms. It is also the name of our very first player, who played our game before anyone else and gave us the most honest feedback.

We are a small studio with a simple belief: with the right AI partners, one person with a clear vision can build and run a world that used to need a whole team. So we hold ourselves to the standards of a larger studio — careful design, real builds checked before they ship, and honest communication with players.

One founder’s imagination. Two AI partners’ hands. And a promise to players we intend to keep.

Arumy emblem: a flower-lattice diamond in indigo and gold with a rouge gem

Our emblem comes from kkotsal, the flower lattice of traditional Korean doors. Four overlapping circles bloom into a flower, the diamond holds it close, and the rouge gem at the center is the heart.

IndigoThe night sky where every story begins

GoldA promise to players we will always keep

RougeA heart that longs to embrace

Our first title

Soul Heroes

A forgotten name sets fate in motion once more.

A collectible idle RPG set in the Tower of Samsara — a tower where time rewinds every time you fall, and Kai alone remembers every rebirth. Build a party of five, climb a hundred floors, and uncover the truth of a vanished kingdom. A strategy mode adds estates, airship fleets and clan warfare.

Heroes

Different races, elements and roles. Choose five to climb with you.

Elements

Fire, Water, Earth, Wind and Lightning — plus front- and back-row tactics.

100

Floors

The main climb of the Tower, with a boss waiting every ten floors.

SLG

Strategy mode

Grow an estate, send airships across a sky map, and rally with your clan.

Meet the heroes

A few of the 26 heroes who climb the Tower with you.

From the test build

Screens from a test build still in development. The final release may differ.

Visit soulheroes.co.kr Pre-register

How we build

Built with Claude, from the first spec to the final check.

Arumy’s founder is not a professional programmer. Soul Heroes — the game, its backend, its 10-language website and its operations tools — has been built by one founder working with two AI partners. Claude leads development; Codex shares the coding.

Claude

Lead

by Anthropic · Lead development partner

Claude works on the game from idea to release: it turns the founder’s direction into plans, designs what players see, and reviews the work before it ships.

Game design & specsSystems, economy, content and story documents
UI design & implementationScreen mockups and their Unity UI code
Review & QACode review, test passes, and build checks against screenshots
Writing & localizationIn-game copy, dev documents and translation review
Studio operationsBookkeeping, business filings, our mail system and this website

Codex

Coding

by OpenAI (GPT) · Coding partner

Codex takes on large coding tasks from Claude’s specs and carries them through to working builds.

Gameplay codeSystems and features in Unity (C#)
Server & backendFirebase functions, database and security rules
Builds & releaseAndroid builds, signing and store bundles
DeploysGame website and admin console

Yang Seungmin, Founder — sets the vision, plays the builds, and makes the final call on fun, tone and quality. Every AI contribution is reviewed by a person before players see it.

Direct

The founder sets the goal for each feature: how it should feel, and why players will care.

Design

Claude writes the spec and draws the UI mockups that both AI partners build from.

Build

Claude and Codex work in the same Unity project. A shared lock file makes sure only one of them edits or compiles at a time.

Verify

Changes are checked in Windows and Android validation builds, with screenshots and logs kept as evidence.

Our toolkit

AI development

ClaudeAnthropic · leadCodexOpenAI · coding

Engine & animation

Unitygame engineSpine2D animation

Art, 3D & video

Ludo.aigame assetsTripo AI3D modelsHiggsfieldimages & video

Music & sound

SunomusicElevenLabssound effects

Backend

Firebaseserver & databaseResendemail

What’s next with Claude

Bring the Claude API into live operations: sorting player support mail and drafting replies for a person to review.
Localization QA across all 10 languages before every update.
Balance and economy checks on every content update, before players feel them.

Company

Let’s build something together.

Partnerships, publishing, press, or just a hello — we read every message.

support@arumycorp.com

Playing Soul Heroes and need help? Visit soulheroes.co.kr/support.

Beautiful worlds,built with AI.