Sonic 2 Delta

From Sonic Retro

Sonic 2 Delta
Version: v0.65
Last release: 2021-06-16
Status: Active
System: Sega Mega Drive
Original game: Sonic the Hedgehog 3 & Knuckles
Credits: Esrael

Sonic Delta 40 Mb (formerly Sonic 2 Delta) is a groundbreaking series of ROM hacks by famed Sonic scene member Esrael Neto, which restores several deleted levels and prototype elements to Sonic the Hedgehog 2 for the Sega Mega Drive. Various features of Sonic Delta 40 Mb, common across the series despite the existence of several versions/branches of the hack, include the use of art and music from the betas and Sonic the Hedgehog and re-implementation of badniks that had been removed from the final game. Several original boss fights have also been created for the hack.

The main version of this hack is entitled Sonic Delta 40 Mb and was based upon the Simon Wai prototype, before version 0.24 transferred the codebase to ‘revision 2’ of Sonic 2 from Sonic Compilation and before version 0.29 transferred to the Sonic the Hedgehog 3 & Knuckles codebase. More information on the various lineages and their history is detailed in the section “Other versions” below.

A hack similar in concept, called Sonic 2 Long Version, has been released by another hacker, Sonic Hachelle-Bee.


The order of levels is directly as shown in the newly implemented Data Select menu:


The "latest version" is most likely out of date, as the developer updates frequently. To ensure you have the most up-to-date version, go to the official website. (up to date as of 2021-06-20)

Latest version

Download.svg Download Sonic 2 Delta
File: Sonic_Delta_v065.rar (2.83 MB) (info)
Current version: v0.65

Prior versions

Other versions

As well as the main branch, titled simply Sonic Delta 40 Mb, Esrael has also created several hacks based upon other versions of Sonic 2.

Sonic 2 Delta II

A hack of the final version of Sonic the Hedgehog 2.

Download.svg Download Sonic 2 Delta II
File: (997 kB) (info)
Current version: 0.10a

Sonic 2 Delta III

A hack of Revision 02 of Sonic the Hedgehog 2.

Download.svg Download Sonic 2 Delta III
File: (845 kB) (info)
Current version: 0.2

Sonic 2 Delta 0

A hack of the Nick Arcade prototype of Sonic 2.

Download.svg Download Sonic 2 Delta 0
File: Sonic_2_Delta_0_V0.03.rar (564 kB) (info)
Current version: 0.03

Sonic 2 Delta IV

The newest edition of Sonic 2 Delta, based on Sonic 2 Beta 4.

Download.svg Download Sonic 2 Delta IV
File: Sonic_2_Delta_4_V0.01.rar (713 kB) (info)
Current version: 0.01

See also

External links

Sonic Retro
Release thread
at Sonic Retro.