: If you are looking for datapacks for Sonic 1 or 2, they are located within the image/x64/raw/retro folder of your Sonic Origins installation. How to Use the File for Decompilations
Sega has historically turned a blind eye to the decompilation as long as no copyrighted code is distributed. However, hosting or sharing the data.rsdk file itself is a clear violation of their intellectual property.
Copy this file (do not move it, or your Steam game won't run) and transfer it to your target device. Note on the "Plus" Expansion
Because the Retro Engine is highly portable, fans have reverse-engineered the RSDK format to run Sonic Mania assets on unofficial platforms like the PS Vita, Nintendo Switch (homebrew), and even Android. These projects usually require the user to supply their own data.rsdk file.
If you want to set this up on a specific device, let me know: