Port of Sonic 1 and 2 to the 3DS, based on Rubberduckycooly’s Sonic 1/2 (2013) decompilation.

In order to run the game, you need to get the “Data.rsdk.xmf” file from a copy of Sonic 1 or 2 (2013), rename it to “Data.rsdk”, and copy it to “/3ds/Sonic1” or “/3ds/Sonic2” respectively on your SD card.

Official video guide on how to get the “Data.rsdk.xmf” file from each game: