Sonic the Hedgehog in DOOM: Legacy Edition is a Sonic the Hedgehog gameplay mod for DOOM, based on Sonic: Lock & Load.
Unlike its big brother, StHiD: Legacy is primarily a gameplay-only experience intended to be played with regular DOOM, or, optionally, your favourite map packs.
Also different is the version naming systems. S:L&L versions have their own version numbers, e.g. v1.3.3, v1.4, but StHiD: Legacy uses dates, like 2023-04-10.
The reason for this is that this project is less important than Sonic: Lock & Load, and so more updates can be pushed out, and I don't have to keep coming up for version numbers, which means less stress for me.
To play an unstable version of StHiD: Legacy, use git clone to clone it to your computer, and open the cloned repo with GZDoom, like you would with a WAD or PK3. You can update with git pull.
Unstable versions are recommended if you want to try the latest stuff and you don't care much about waiting for the next release.
Sonic the Hedgehog in DOOM is a fan-made DOOM mod. All copyrights go to their intended holders.
Sonic the Hedgehog is property of SEGA. DOOM is property of id Software.