I am actually working in the first Harder Project, that is working on Sonic 1 from Mega Drive. The game shows a lot of ported musics, new sonic animations, new level graphics, and new modified sound effects, and exclusively edited level layouts and palettes.
The most exclusively part from the hack is that him aims to restore features from another Sonic games, as the 'arrow/continuation' monitor, and musics from Master System's version of Sonic series.
There's the playlist that the game plays into the levels:
Green Hill Act 1 Green Grove Act 1 (Sonic 3D Blast)
Green Hill Act 2 Angel Island Act 2 (Sonic 3)
Green Hill Act 3 Evening Star (Knuckles Chaotix)
Marble Act 1 Aquatic Ruin *Original* (Sonic 2 Final)
Marble Act 2 Aquatic Ruin *Edited* (Sonic 2 Beta)
Marble Act 3 Volcano Valley Act 1 (Sonic 3D Blast)
Spring Yard Act 1 Casino Night (Sonic 2 Final)
Spring Yard Act 2 and 3 Casino Night (Sonic 2 Beta)
Labyrinth Act 1 Mystic Cave 2 Players (Sonic 2 Final)
Labyrinth Act 2 Mystic Cave 2P/Hidden Palace (Sonic 2 Beta)
Labyrinth Act 3 Hidden Palace (Sonic 2 Final)
Star Light Act 1 Rusty Ruin Act 1 (Sonic 3D)
Star Light Act 2 Rusty Ruin Act 2 (Sonic 3D)
Star Light Act 3 Mystic Cave (Sonic 2 Final)
Scrap Brain Act 1 Electric Egg (Sonic Chaos - Master System)
Scrap Brain Act 2 Scrap Brain in SMS version (Sonic 1 - Master System)
Scrap Brain Act 3 Panic Puppet Act 2 (Sonic 3D Blast)
Final Zone The Doomsday (Sonic & Knuckles)
First of all, thanks to all who have helped me with the bugs I've found in the wa of the work on this release.
Special credits to:
Nineko to create your fabulous xm2smps and xm3smps tool. Without it, my ports of SMS would not have been possible, and your music per-act tutorial.
Mistergambit to give me permission to use his beautiful beta backgrounds in my hack.
Tweaker to the help with sound effect porting.
Master3k by the s3 drum styles that have sended an special effect to the musics into my hack.
Puto to create the tutorial to add ss2 full spindash.
SCAA to the Sonic CD's sprites like Buzzbomber and Motobug.
All the people that got patience and gives me all the touch about the game details to improve.
An screenshot from the arrow monitor working on the hack:
Let's enjoy the hack !
Here's the download link
*Updated at 3/17/2010*