
Sonic the Hedgehog 2 Addendum
A downloadable s2addendum
The development for Sonic 2 is undoubtedly a well-documented piece of Sonic history, showcasing the process of how the Sega Genesis/Mega Drive classic came to be from its co-development between Sonic Team and Sega Technical Institute. A combination of scrapped content, additional quality-of-life tweaks and bonuses result in the Sonic 2 you know and love getting better than ever.
Not one for resting on his laurels, Sonic takes to the sky in his trusty biplane, the 'Tornado', in search of adventure. Before long he makes a pitstop on a beautiful island full of green fields and hills. Known as West Side Island, it is where Sonic meets a young two tailed fox named Miles "Tails" Prower, who is inspired by Sonic's cool demeanor. Despite its unassuming appearance, West Side Island holds the key to Dr. Eggman's latest malevolent plans for world conquest. Legend speaks of seven mystical stones that sleep there, sealed by the gods after an ancient civilization abused their powers. Dr. Eggman believes the legend refers to the Chaos Emeralds, which he needs to power his ultimate weapon: The Death Egg! Tails barely has time to marvel at Sonic's biplane before Dr. Eggman makes his explosive entrance, tearing West Side Island up with an army of badniks in tow. It's going to take more than one hero to sort this mess out - are you really up 2 it?
Based on copyrighted materials belonging to Sega and Sonic Team.
| Updated | 24 days ago |
| Status | In development |
| Author | Speems |
| Genre | Platformer |
| Tags | No AI, sonic, sonic-2, sonic-the-hedgehog |
Download
Install instructions
To play this game, open the downloaded ROM with a Sega Genesis emulator like BlastEm. Drag and drop it into BlastEm window and the game will start.
Development log
- SHC 2025 is here!24 days ago

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