Play Elden Ring as Frontiers' Sonic, with Sonic Frontiers' island, Cyber Space and Titan music scoring the whole Lands Between.

A remix of nurzhan69420's Sonic Ring: you play Elden Ring as Sonic, built from your own Sonic Frontiers. This edition adds Sonic Frontiers' soundtrack, read from your own copy, in place of Elden Ring's music.
What you get
Known issue (from Sonic Ring): after boosting off a cliff into the sea, Sonic can end up stuck underwater instead of dying. Open the map and fast-travel to a Site of Grace to get out.
Nothing from either game is included. The music, Sonic's model and his sounds are read from your installed copies when you play. Single player, offline (Melty starts Elden Ring through ModEngine2 with Easy Anti-Cheat off). Needs Elden Ring 2.7.1 and Sonic Frontiers (Steam).
Credits: Sonic Ring by nurzhan69420 (MIT). ER Mario by Delta (MIT). fromsoftware-rs by Vincent Swarte and contributors (MIT / Apache-2.0). cridecoder (MIT), cpal (Apache-2.0), ModEngine2 (MIT), plus the others listed in THIRD-PARTY-NOTICES.md.