Sonic 1 Delta

By MrLordSith

Sonic 1 Delta is a hack created by Team Delta to mix lots of development material, concepts such as gameplay mechanics, art, zones from Sonic 1 into one adventure.

This demo has the following levels available: GHZ, MZ, SLZ and SYZ.

Main features:

Each level has mostly new layouts and palettes to replicate parts from beta screenshots of the original game and improve upon them to have new features. Green Hill Zone has it's Beta Ball (which will be helpful along the way to kill enemies), Marble Zone has it's beta UFOs on the background and it's mockup yellow tiles as platforms, Sonic's got his original palette, new sprites and animations to represent Sonic from the concept arts more accurately.

Other features:

- New splash screens

- Gave function to the unused 'S' monitor (it's in some levels, you just gotta look for it!)

- The Special Stages are now Bonus Stages, they now have a countdown timer (get as many lives and rings as possible!).

- The game's demos now have a "DEMO MODE" text on the screen.


The hack currently puts the amount of objects on screen to its limits, so there's the chance that sometimes objects will disappear, this is most notable on Marble Zone.


ASM Editing: MrLordSith (GHZ Ball made by CuckyDev)

Art changes: EmmaNerd and MrLordSith

Level layout: EmmaNerd and MrLordSith

Music: MrLordSith, Clownacy and Flamewing for the VGM conversions, S1smps2asm by Cinossu

Beta testing: asdfg303, BladeOfChaos, Chobo, EmmaNerd, facey, ItsJacksJunk⁶⁴, ManiacShard, The Original Gamer 123, SM

And also credits to the tutorials from Sonic Retro and tutorials from SSRG (like Dynamic Palettes).


File Type: 7z

File Size: 434.72 KB

Jdpense @ 2020-10-26 19:04:17

I quite like some of the extra gimmicks added, like GHZ ball for instance, but I felt that some of the layouts were a little too close to the orginal stock vanilla layouts for my liking. Although I liked some of the custom art and sprites for Sonic! The Special Stages had some interesting designs, but I kinda got lost in them.

MayoMan @ 2020-10-28 10:21:02

I haven't played Sonic in a while, so this gave me quite the Refresher.

Dima_Cool @ 2020-10-28 13:32:35

Comment deleted by Dima_Cool @ 2020-10-28 13:32:50

Dima_Cool @ 2020-10-28 13:33:18

This hack is awesome

SnocDaHoodge @ 2020-10-29 11:57:48

Man, this game is no joke. It's a great one, maybe the best Sonic 1 rom hack ever. Keep up with the great work!

mr_rubbaduck @ 2020-10-30 00:28:47

There is something to be said about this hack and not quite sure how to put it. It simultaneously feels nostalgic and different, almost as if you are playing Sonic The Hedgehog from an alternate reality. I love this hack for showing what could have been or perhaps what once was. Thank you for this remarkable experience.

BigMann @ 2020-11-03 22:09:19

Couldn't have said that better myself. Marble Zone Act 2 and 3 were the best looking aesthetically imo. Totally felt like I was playing something so familiar but it's a completely new experience. Great hack.

Last modified by BigMann @ 2020-11-03 22:09:59

sodbilguun @ 2020-11-11 22:24:43

This Hack Needs Level Select!

anonimouse @ 2020-11-19 12:08:43

the other levels are probably WIP right now or are just the regular versions, probably why you cant use it.

anonimouse @ 2020-11-19 12:08:04

mmm, pretty cool.

sodbilguun @ 2020-12-02 05:58:52

I found a bug. if you break the shleid monitor on SYZ Act 3. You stuck on the spring if you jump it will not work. Only way to get out Time Over

sodbilguun @ 2020-12-02 06:12:25

I finally completed the Game i like the journey the bonus stage is good i rate this 10/10