# RSDKModding/RSDKv4-Decompilation

A complete decompilation of Sonic 1 & Sonic 2 (2013) & Retro Engine (v4)

Repository: https://github.com/RSDKModding/RSDKv4-Decompilation
Canonical: https://ross.abutalabs.com/products/rsdkv4-decompilation
Language: C++
License: NOASSERTION
License Family: other
Last push: 2026-07-19T18:19:16+00:00

## Health v2 (maintenance only)
Score: 70/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 93, release rhythm 22, longevity 100
- inputs: {"age_days": 2087, "days_push": 45, "days_rel": 305, "gap_med": null, "n_releases_24m": 1}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1120, forks 247 (observed 2026-08-28T04:03:39.674267+00:00)

## What it is
A complete C++ decompilation of the Retro Engine v4 powering the 2013 mobile releases of Sonic 1 and Sonic 2, including their menus. It requires assets from a legally obtained copy of the games and adds features like a built-in mod loader, script compiler, debug tools, and multiplayer networking for Sonic 2.

## Use cases
- play sonic 1 and 2 on platforms without official releases
- run sonic 1 & 2 with a mod loader
- host and join sonic 2 2P VS multiplayer servers
- mod sonic 1 and 2 with custom scripts and achievements
- debug and inspect retro engine game scenes and hitboxes
- transfer saves from the official mobile versions

## When to choose
- you own the official games and want to play them on unsupported platforms
- you want to create or play mods for Sonic 1 & 2 (2013)
- you want native desktop or console-like performance instead of mobile builds

## When to avoid
- you don't own the official game assets, since the engine won't run without them
- you want a general-purpose retro engine rather than these specific games
- you need a legally redistributable full game

## Facets
- artifact type: application
- maturity: active
- function: game-engine, interpreter, gui
- domain: gaming-tools, cross-platform
- platform: windows, cross-platform, cpp
- tags: retro-engine, sonic-1, sonic-2, decompilation, mod-loader, game-port, game-development, macos, linux, android, ios

## Member repositories
- RSDKModding/RSDKv4-Decompilation (main) score 70

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:39.674267+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 2026-08-30T06:41:04.361340+00:00, confidence not recorded.
  - readme: https://github.com/RSDKModding/RSDKv4-Decompilation (fetched 2026-08-28T04:03:39.674267+00:00, sha e3c8e3b2a5bd)
- Data as of 2026-08-30T08:39:29.467469+00:00.