# DESIGN.md · OpenGameArt.org (+ itch.io free assets) (GP-008)

> Written for AI coding agents. Values marked **OFFICIAL** come from the documented source named below; values marked **ESTIMATED** were measured by us from our own screenshots and are approximate. Never treat ESTIMATED values as official brand tokens.

## Overview
- Type: Game Asset Library · Category: K. Gaming and Pixel Art
- Platforms: Web
- Color theme: Monochrome dark · Layout pattern: Card grid · Mood: Community, old-web, busy
- License / terms: Per asset: CC0, CC-BY 3.0/4.0, CC-BY-SA 3.0/4.0, OGA-BY 3.0/4.0 or GPL, as listed on each submission (OGA FAQ). Itch.io assets: each creator’s own terms

Community library of free game art, music and sound, each upload carrying its own open licence; itch.io’s free game-assets listing is the main alternative, with creator-set terms per pack.

### Analysis (ours)
Our capture of OpenGameArt.org: a dense dark-blue portal layout with a top nav, tiles of the latest art, music and sound, and side columns for forums and collections. Strength: every submission states its licence and an attribution notice. Risk: licences vary per file (CC-BY-SA and GPL bring share-alike duties), so you must record the licence of each asset you download.

### Best practices (ours)
- Record the licence and author of every file you download in a credits sheet at the moment you download it (OURS).
- If an asset lists several licences, you only need to follow one of them (OFFICIAL, https://opengameart.org/content/faq).
- Watch DRM: CC-BY and CC-BY-SA forbid distribution with DRM, OGA-BY removes that restriction; check before shipping to console or app stores (OFFICIAL, OGA FAQ).
- For itch.io packs, read each creator’s page: terms are set per pack, not by itch.io (OURS, https://itch.io/game-assets/free).

### Deep analysis
Values marked OFFICIAL come from the cited official page, README, licence file or package metadata, fetched 2026-10-24 (UTC+8). ESTIMATED values were measured by us that day (CSS file sizes from unpkg, class and colour counts, contrast ratios). OURS is our interpretation, not legal advice.

#### Licences on OGA (OFFICIAL) · source: https://opengameart.org/content/faq
- CC0: ‘may be copied, modified, distributed … without asking, crediting or notifying’.
- CC-BY 3.0/4.0: credit required, indicate changes, no DRM distribution. CC-BY-SA: same plus share-alike. OGA-BY 3.0/4.0: CC-BY without the DRM restriction. GPL is also allowed.
- With several licences listed, you may pick one of the listed licences and follow only that one (OGA FAQ answer, paraphrased).

#### How to credit (OFFICIAL) · source: https://opengameart.org/content/faq
- If no notice is given: "[asset name]" by [author name] licensed [license(s)]: [asset url], in the credits file and credits screen.

#### itch.io free assets (OURS) · source: https://itch.io/game-assets/free
- itch.io lists thousands of free packs, but each creator sets the terms; read the pack page and save it with the download.

#### Pitfalls and lessons (OURS) · source: https://opengameart.org/
- Share-alike (CC-BY-SA, GPL) can oblige you to release derivative art under the same licence; avoid it for closed commercial art unless you accept that.

### Usage terms at a glance (our summary, not legal advice)
- Commercial use: Yes under each asset’s licence
- Attribution: Required for CC-BY / CC-BY-SA / OGA-BY / GPL assets
- Redistribution: Per licence (share-alike for BY-SA and GPL)
- How you get it: Free download per submission

## Color tokens
No official color tokens documented for this entry.

ESTIMATED · dominant colors measured from our screenshot(s) of the source site (median-cut quantization; share = % of pixels). Approximate, not official:

- `#637B9D` ~22%
- `#476790` ~20%
- `#30445E` ~18%
- `#8FA3B8` ~8%

## Typography
No official type scale documented for this entry; use the product’s own typography guidance.

## Spacing, radii, shadows
Not documented for this entry. Do not invent values; derive from your own design system.

## Components
- Latest art / music tiles
- Licence badges per submission
- Collections
- Forum and comments

## Layout rules
- Observed layout pattern: **Card grid** (from our captures).

## Usage
```
Credit template from the OGA FAQ (when no notice is given):
"[asset name]" by [author name] licensed [license(s)]: [asset url]
```

## Do’s and don’ts
- Do: Use a near-black canvas with high-contrast white text and at most one accent.
- Don’t: Don’t add multiple saturated accents or light-mode shadows.
- Do: follow the source’s license/terms listed above.
- Don’t: present ESTIMATED colors as official tokens.

## Sources
- https://opengameart.org/
- Library entry: https://design-library-byt.pages.dev/entry/GP-008