Uploaded September 2024 | Updated September 2026, 2 weeks ago

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Get it here: https://shc.zone/entries/contest2024/1049

This is a port of the Yuusei demo of Sonic CD to stock Sega Mega Drive, better known as v0.02 or the 1204 prototype. It is directly built off of the R11B__.MMD file in the disk, which originally handled Round 1 Zone 1 Past. This project was started on August 4, 2024 using a disassembly by KatKuriN.

This port features:
Zones 1 and 2 of Palmtree Panic Salad Plain (Not just R11A!)
NEW: R13D, including its boss ported from 510!
Functional time travel
A Sega and Title screen
New sound effects
Pausing
Level select (LRLRLR): Can access all normally accessible levels from v0.02 plus R13D, and a bonus level, R31A (objectless)!

This port isn't fully feature-complete. Missing big features include:
Time Attack
Time travel cutscene
The music. Unfortunately, the full soundtrack could not be translated to the Mega Drive's sound chips in time for the submission, so what you'll hear is music borrowed from Sonic 1.
Good Future levels (you can't access them in the original demo anyway)

Bugs present in the original demo are mostly retained here, but certain ones have been fixed due to the porting method. Those would include:
Sonic's sprites being bugged
Time and rings clearing upon time travel
Time travel not working on spinning platforms
Any sound related bug that existed in the original version (The project now uses Sonic 1's sound driver)

Projects server: discord.gg/VZbyGRz3Bc
Other things of mine: https://linktr.ee/mdtravis