Drive Core

A free, community-built character and mecha builder for Battle Century G Remastered. No accounts, no servers — everything lives in your browser.

Inspired by Fultimator, the community builder for Fabula Ultima.

Features

• Pilot Builder — attributes, skills, traits, genre powers, and themes
• Mecha Builder — attributes, upgrades (including Expansion Pack, Invincible Super Combination, and other special upgrades), and weapons
• Builds persist locally in your browser via localStorage
• Import / export builds as JSON for sharing
• Light, dark, and system theme support

Stack

• SolidJS — reactive UI
• TypeScript — strict mode throughout
• Tailwind CSS v4 — utility-first styling
• Kobalte — accessible headless UI primitives
• Vite — build tooling
• Bun — runtime and package manager

Getting Started

bun install
bun dev

Other commands:

bun build       # production build
bun preview     # preview production build
bun test        # run tests
bun typecheck   # tsc --noEmit

Contributing

Pull requests are welcome. For larger changes, open an issue first so we can talk through the approach.

A few things to keep in mind:

• All PRs must pass bun typecheck (TypeScript strict mode, no any without justification)
• Game mechanics changes need a rulebook page reference in the PR description
• No prop destructuring — it breaks SolidJS reactivity
• bun only, never npm, pnpm, or yarn

Game Content Attribution

Rules text, game data, and other content from Battle Century G Remastered used in this project belongs to its author and is used here under its original license:

Battle Century G is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

© 2022 Juan Herrera. Some Rights Reserved.

Rules Version 1.84

License

Drive Core's source code is licensed under the MIT License.

Game content (rules text, descriptions, and data sourced from the BCG-R rulebook) is separately attributed above and remains under its original CC BY-NC-ND 4.0 license.