Sonic CD
1 recomp and 1 port
Sonic CD (2011, decompilation)
RSDKModding/RSDKv3-Decompilation
Complete decompilation of Sonic CD (2011) along with Retro Engine v3 (v1.3.3). Cross-platform; you supply your own game assets.
You needThe assets from an official Sonic CD copy (the FMVs only come from the Steam release).
Sonic CD (Little Planet)
carl0srmz/littleplanet
Little Planet: a native port of the Mega-CD (Sega CD) version for Windows, macOS, and Linux (x86-64 and ARM64). It carries a disassembly of all the game’s code that reassembles byte-identical to the disc, and a static recompiler that turns it into C, which is what runs; it’s checked frame by frame against an interpreter. The rest of the machine is written from scratch: both 68000s, the Z80, the VDP, FM, PSG, and PCM sound, the CD drive, and the Mega-CD graphics chip, and no BIOS is needed, since the game’s calls are replaced by a high-level implementation. It adds a True16:9 widescreen mode that shows more of the level instead of stretching the picture (on by default), filters such as CRT or Scale4x, remappable controls, save states, fast-forward, and an automatic save after every zone. It replaces the opening movie with LuanUP’s 4K 60 fps remaster, included with their permission; the original is still available in the settings. It accepts cue/bin, iso, ccd/img, chd, and cue images with wav, flac, ogg, or mp3 audio tracks. Version 1.0 came out on October 11 and is rebuilt with every code change; the latest build is from October 19. Of its 36 commits, 27 list Claude as co-author. The repository includes the disassembly of the disc’s 112 executable files, code only: graphics, sound, and levels are read from your copy.
You needYour own Sonic CD disc image for Mega-CD. The tested release is the Japanese one (G-6021, with the data-track SHA-1 given in the README); other releases boot but are untested. Plus 64-bit Windows, macOS 11 or later (Apple silicon or Intel), or x86-64 or ARM64 Linux.
Installs with
Quiver Launcher · ReComp Launcher
Questions
Can you play Sonic CD natively on PC?
Yes. The catalog has 1 recomp and 1 port, and one of them is fully playable.
What do I need to play it?
Your own copy of Sonic CD (Mega-CD / Sega CD). Recompendium only links projects that don’t distribute the game, and each entry says which version or region you need.
Which one is the most popular?
Sonic CD (2011, decompilation), with 714 stars on GitHub.