If you own a legitimate copy of Sonic Forces on Switch but hate that Episode Shadow costs extra or that you missed the Sanity Island DLC, then the is technically a way to reclaim that content for free.
Sega has made several key expansions and cosmetic packs available at no cost for all players: Episode Shadow sonic forces switch nsp update all dlc free
If you are looking to acquire the game and all associated content in a single package, you would need the , the Version 1.0.2 Update NSP , and the DLC NSP which includes the Episode Shadow campaign. If you own a legitimate copy of Sonic