# Stephane-D/SGDK

SGDK - A free and open development kit for the Sega Mega Drive

Repository: https://github.com/Stephane-D/SGDK
Canonical: https://ross.abutalabs.com/products/sgdk
Homepage: https://www.patreon.com/SGDK
Language: C
License: MIT
License Family: permissive
Topics: sega-genesis, sega, programming, c, sdk, gcc, retrodev, 68000, assembly, megadrive, sgdk, mega-drive, sgdk-library, game-development, m68k, m68k-assembly, m68k-elf-gcc, motorola-68000, sega-megadrive, java
Last push: 2026-08-17T08:47:30+00:00

## Health v2 (maintenance only)
Score: 78/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 40, longevity 100
- inputs: {"age_days": 4188, "days_push": 16, "days_rel": 518, "gap_med": 0, "n_releases_24m": 2}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2185, forks 233 (observed 2026-08-28T04:06:23.657692+00:00)

## What it is
SGDK is a free, open-source development kit for writing Sega Mega Drive / Genesis software in C (with optional 68000 assembly). It bundles a hardware abstraction library, resource compilation tools, and an m68k-elf GCC toolchain setup to produce ROM images.

## Use cases
- develop a sega genesis game in c
- build a mega drive homebrew rom
- learn retro console programming
- compile sprites and tile resources for megadrive
- make a 16-bit console game without writing assembly

## When to choose
- you want to write Sega Mega Drive / Genesis games in C
- you need a maintained toolchain and library for 68000 homebrew development
- you want resource compilation tools for sprites, tiles, and sound

## When to avoid
- you target other retro consoles like SNES or NES
- you need a high-level modern game engine with visual tooling
- you are not comfortable with C programming or low-level hardware concepts

## Facets
- artifact type: library
- maturity: active
- function: sdk, compiler, graphics, game-engine
- domain: embedded-systems, developer-tools
- platform: cross-platform, windows, cpp, embedded
- tags: sega-genesis, mega-drive, m68k, retrodev, rom-development, gcc, homebrew, game-development, retro, linux, macos

## Member repositories
- Stephane-D/SGDK (main) score 78

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:23.657692+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:48:10.818515+00:00, confidence not recorded.
  - readme: https://github.com/Stephane-D/SGDK (fetched 2026-08-28T04:06:23.657692+00:00, sha 8c7fe34e19dd)
  - homepage: https://www.patreon.com/SGDK (fetched 2026-08-29T10:28:10.760535+00:00, sha e78b99e241a2)
  - site_page: https://www.patreon.com/sgdk/about (fetched 2026-08-29T10:28:10.769598+00:00, sha 9cf1aa71c06a)
- Data as of 2026-08-30T08:39:29.467469+00:00.