Sonic the Hedgehog / Sonic the Hedgehog 2 (2013, decompilation)

Games: Sonic the Hedgehog → (Mega Drive / Genesis, 1991) · Sonic the Hedgehog 2 → (Mega Drive / Genesis, 1992)

A complete decompilation of Retro Engine v4 (RSDKv4) and of the menus from the 2013 versions of Sonic the Hedgehog and Sonic the Hedgehog 2, released for iOS and Android; it comes from the same author as the Sonic CD and Sonic Mania decompilations. It works with data from the mobile versions, Sega Forever ones included, and partly with Sonic Origins data, which lacks the music and sound effects (Origins doesn’t keep them in those files) and some menu assets, which can be copied over from the mobile versions. Both games’ scripts are decompiled separately, in another repository, and fix bugs in some versions, such as the softlock at the end of certain acts on very wide screens. It adds the RSDKv5U script compiler, a mod loader with its own API, a settings.ini file with every setting, a dev menu with debugging tools, and Sonic Mania Plus’s idle screen dimming, and lets you play Sonic 2’s Egg Gauntlet Zone in Time Attack if your version includes it. It also has a networked 2P VS mode for Sonic 2, with a Python server the project itself calls an unstable proof of concept. The released builds don’t allow the Origins Plus DLC or playing as Amy: for that you have to build it yourself. There are builds for Windows (32- and 64-bit), Linux, and Android; the latest is 1.3.3 (November 2, 2025).

You needThe data from your own official copy of the 2013 Sonic the Hedgehog or Sonic the Hedgehog 2: the iOS or Android versions (delisted, but you can redownload them from your purchase history) or Sonic Origins for Windows (Steam or Epic Games Store) or Switch. Origins data has to be used in folder mode or repacked, with the audio from the mobile versions added. Plus Windows, Linux, or Android; on other systems, build it from source.

How it gets to PC

Port of a decompilation

Console

Java ME, BREW, iOS, and Android

Original studio

Christian Whitehead / Sega

Year

2013

Author

Rubberduckycooly / MegAmi24 / stxticOVFL

Stars

1.2k

Last activity

2026-10-28 · 3 days ago

Latest version

1.3.3 · 2025-11-02

Language

C++

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