Receive 'Alternative Sound - Vania Mix (Castlevania, Dracula II: Simon's Quest, Castlevania III: Dracula's Curse)' to use in Contra: Operation Galuga when you link your save data from this game
Make sure to follow the Steam Community page to keep up to date of all things Contra: Operation Galuga !
https://store.steampowered.com/app/2235020/Contra_Operation_Galuga/