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Sonic The Hedgehog Open Source Project (STHOSP) is a modification of Sonic 1 for Sega Mega Drive with open source code that I've done, the modification has several new features in relation the original game:
- Now each level has four acts
- Each levels have new design
- You can play with the Sonic or with the Tails, each with their own skills
- The transformations of Super and Hyper is accessible for both characters
- Monitors 'S' and monitors Eggman reprogrammed, now monitors Eggman cause damages and monitors 'S' transforms the character in Hyper and add 50 rings
- Mode "ITEM S ONLY", where all monitors become monitors of the type 'S'
- New songs, including one for each boss, act and special stage
- Sound driver for PCM musics, single music of the game in PCM is the number B7 in the sound test, Canterbury Plains of Top Gear 2
- Time Attack edited only for levels
- Support for SRAM, which allows save the game and the Time Attack
- Different palettes
- Some menus of the Sonic 2
- The rings counter is not reset between acts
- Original Mode with levels and músics of Sonic 1
- Removed the spike bug (bug that makes the Sonic, with invulnerability, die if do not have rings or lose rings if have, when is struck by a spike)
- In the question of dynamic of fluids was added to modification the Sonic Boom and Super Cavitation
Skills for both characters
Jump - The character jumps normally
Spindash - Impulse that the character leaves Rolling
Slow Spindash - Same as Spindash but slowly
Spin Boost - Spindash snapshot with the same speed of Slow Spindash
Rolling the Sonic/Tails is in foot - When is rolling, the character will in foot instantly
Sonic's Skills
Infinite Jump - Extra jump upward (-2 rings)
Jump Down - Extra jump downward (-1 rings)
Homing Attack - Extra jump toward the enemy
JumpDash - A impulse in air, playing Sonic forward
JumpDash Angle - Same as JumpDash, but in any direction
Chrono Attack - Stop the Time and add 20 seconds when it finishes executing the skill
Super Peelout - A impulse faster than Spindash where Sonic rushes, but tends to expect, less if is Super or Hyper, how much longer you wait, more faster Sonic will run
Shoryuken - Jump with a trail of fire in the hand of the Sonic
Tails' Skills
Tails Fly - Flight Upward
Tails Fly Down - Flight downward
Swim Tails - Swim upward
Swim Tails Down - Swim downward
Below the main changes in version 0.06 for the 0.07:
- Added the Super Cavitation and the Sonic Boom
- Added the act 4 for each zone, except for the Scrap Brain and the Labyrinth (Labyrinth already have a 4th act)
- Tails can swim now
- Modified the main menu
- Imported from Sonic 2, Menu Options, the Result Screen and stars of Super Sonic
- Fixed several bugs
Images of the Modification
Title Screen
Sonic turning into Super
Sonic making the Super Peelout
Sonic using the Chrono Attack
Super Sonic breaking the sound barrier
Sonic doing Shoryuken
Tails Super Cavitating
Menu Options
Level Select
Result Screen
Magic Forest 1 Gameplay
How to compile
To build the ROM run the build.bat which is in the folder SOURCE CODE.
Download STHOSP - 0.07
http://goo.gl/wG3Ng
- Now each level has four acts
- Each levels have new design
- You can play with the Sonic or with the Tails, each with their own skills
- The transformations of Super and Hyper is accessible for both characters
- Monitors 'S' and monitors Eggman reprogrammed, now monitors Eggman cause damages and monitors 'S' transforms the character in Hyper and add 50 rings
- Mode "ITEM S ONLY", where all monitors become monitors of the type 'S'
- New songs, including one for each boss, act and special stage
- Sound driver for PCM musics, single music of the game in PCM is the number B7 in the sound test, Canterbury Plains of Top Gear 2
- Time Attack edited only for levels
- Support for SRAM, which allows save the game and the Time Attack
- Different palettes
- Some menus of the Sonic 2
- The rings counter is not reset between acts
- Original Mode with levels and músics of Sonic 1
- Removed the spike bug (bug that makes the Sonic, with invulnerability, die if do not have rings or lose rings if have, when is struck by a spike)
- In the question of dynamic of fluids was added to modification the Sonic Boom and Super Cavitation
Skills for both characters
Jump - The character jumps normally
Spindash - Impulse that the character leaves Rolling
Slow Spindash - Same as Spindash but slowly
Spin Boost - Spindash snapshot with the same speed of Slow Spindash
Rolling the Sonic/Tails is in foot - When is rolling, the character will in foot instantly
Sonic's Skills
Infinite Jump - Extra jump upward (-2 rings)
Jump Down - Extra jump downward (-1 rings)
Homing Attack - Extra jump toward the enemy
JumpDash - A impulse in air, playing Sonic forward
JumpDash Angle - Same as JumpDash, but in any direction
Chrono Attack - Stop the Time and add 20 seconds when it finishes executing the skill
Super Peelout - A impulse faster than Spindash where Sonic rushes, but tends to expect, less if is Super or Hyper, how much longer you wait, more faster Sonic will run
Shoryuken - Jump with a trail of fire in the hand of the Sonic
Tails' Skills
Tails Fly - Flight Upward
Tails Fly Down - Flight downward
Swim Tails - Swim upward
Swim Tails Down - Swim downward
Below the main changes in version 0.06 for the 0.07:
- Added the Super Cavitation and the Sonic Boom
- Added the act 4 for each zone, except for the Scrap Brain and the Labyrinth (Labyrinth already have a 4th act)
- Tails can swim now
- Modified the main menu
- Imported from Sonic 2, Menu Options, the Result Screen and stars of Super Sonic
- Fixed several bugs
Images of the Modification
Title Screen
Sonic turning into Super
Sonic making the Super Peelout
Sonic using the Chrono Attack
Super Sonic breaking the sound barrier
Sonic doing Shoryuken
Tails Super Cavitating
Menu Options
Level Select
Result Screen
Magic Forest 1 Gameplay
How to compile
To build the ROM run the build.bat which is in the folder SOURCE CODE.
Download STHOSP - 0.07
http://goo.gl/wG3Ng
Pallet made by me...
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