From Sonic Retro

This page describes an obsolete hacking tool that should not be used for new hacks/projects or with new disassemblies/tools.
This page (and associated files) is being kept for historical purposes only, as it documents and archives the history of the Sonic scene.
SonED2 offers greater flexibility and compatibility with split disassemblies.
Category: Level editor
Version: .50b
Status: Inactive
System: Microsoft Windows
Supported Games: Sonic 1, Sonic 2,
Sonic 3 & Knuckles, Sonic CD PC
Credits: Stealth

SonED was the first level editor created for a Sonic the Hedgehog game for the Sega Mega Drive, and eventually became the first level editor to support the PC version of Sonic CD as well. Known for its ease of use, the program can edit object placement, palette, art, and more. New users will find the program an easy-to-use introduction into the world of editing and developing video games, while returning users will be able to use its more advanced features, as noted below.


SonED was created by Stealth from the Sonic hacking community. Following the reveal of object and ring layout notes posted to the Sonic 2 Hacking Guide by Saxman in early 1999, Stealth began building an editor to modify those layouts. The resulting program would be named SonED, a portmanteau of the words "Sonic" and "Editor", inspired by the DooM editor "DoomED".

With Saxman publicly stating his interest in having someone make a level editor, Stealth provided version .002a to Saxman for testing, which contained an entirely blue background and rings as placeholders for objects. Then on 05/10/1999, version .003a was sent over to Saxman, and subsequently released to the public for consumption. This newer version showed the level foreground. Only Emerald Hill Zone act 1 could be modified by this point.

In an attempt to augment his cost-of-living budget, the program was originally introduced as shareware at a price of $30; he later reconsidered and reduced the cost to $15 before any sales were made, after which only a few people decided to register. Eventually, someone had released their registered copy, which led to Stealth leaving the scene. Shortly afterward, he came back to release newer versions of his SonED utility for free, after having contacted the registrants on the subject.


Sonic Retro emblem.svg Main article: SonED2

SonED2 is a total re-build of the original SonED tool with improved features and stability.


Download.svg Download SonED
File: SonED_v.0.50b_(Windows).zip (405 kB) (info)
Current version: .50b

Old Releases