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
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00700](https://2img.net/r/ihimizer/img580/1341/sthosp00700.png)
Title Screen
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00700](https://2img.net/r/ihimizer/img697/9425/sthosp00700.gif)
Sonic turning into Super
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00702](https://2img.net/r/ihimizer/img213/383/sthosp00702.png)
Sonic making the Super Peelout
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00710](https://2img.net/r/ihimizer/img409/7289/sthosp00710.png)
Sonic using the Chrono Attack
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00703](https://2img.net/r/ihimizer/img40/9653/sthosp00703.png)
Super Sonic breaking the sound barrier
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00704](https://2img.net/r/ihimizer/img714/8124/sthosp00704.png)
Sonic doing Shoryuken
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00705](https://2img.net/r/ihimizer/img408/6822/sthosp00705.png)
Tails Super Cavitating
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00707](https://2img.net/r/ihimizer/img214/9139/sthosp00707.png)
Menu Options
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00708](https://2img.net/r/ihimizer/img340/774/sthosp00708.png)
Level Select
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00709](https://2img.net/r/ihimizer/img841/3695/sthosp00709.png)
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
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00700](https://2img.net/r/ihimizer/img580/1341/sthosp00700.png)
Title Screen
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00700](https://2img.net/r/ihimizer/img697/9425/sthosp00700.gif)
Sonic turning into Super
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00702](https://2img.net/r/ihimizer/img213/383/sthosp00702.png)
Sonic making the Super Peelout
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00710](https://2img.net/r/ihimizer/img409/7289/sthosp00710.png)
Sonic using the Chrono Attack
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00703](https://2img.net/r/ihimizer/img40/9653/sthosp00703.png)
Super Sonic breaking the sound barrier
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00704](https://2img.net/r/ihimizer/img714/8124/sthosp00704.png)
Sonic doing Shoryuken
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00705](https://2img.net/r/ihimizer/img408/6822/sthosp00705.png)
Tails Super Cavitating
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00707](https://2img.net/r/ihimizer/img214/9139/sthosp00707.png)
Menu Options
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00708](https://2img.net/r/ihimizer/img340/774/sthosp00708.png)
Level Select
![Sonic The Hedgehog Open Source Project 0.07 Sthosp00709](https://2img.net/r/ihimizer/img841/3695/sthosp00709.png)
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