Yep. I assume that the game has fallbacks for "failed save" and "bad data from server" that you could exploit / patch / use in a work-around here. Worst-case, you'd make a real server that accepts save game data and stores it, and maybe does some "verification" of client data packages (AKA "discard client response and return a big thumbs up in all cases"). It might be more complicated than that if they're implementing a challenge / response, but I have no idea how much effort they're going through for DRM these days when it's been shown to NEVER work.