The decompilation project provides the "engine" (the code that runs the game), but it does not include the copyrighted "assets" (the art and sound) to avoid legal issues with SEGA. By providing your own Data.rsdk , you are proving ownership and completing the game package yourself.
, navigate to the game's installation folder on your PC (typically C:\Program Files (x86)\Steam\steamapps\common\Sonic Mania Identify the File : Look for a file exactly named : Decompilation versions are generally not compatible file found in the Netflix Games mobile release. Android Installation Steps Prepare Folders sonic mania data.rsdk download android
However, note that most mods are designed for the PC data.rsdk structure, so compatibility varies. The decompilation project provides the "engine" (the code